diff --git a/backend/src/main/java/pl/polskalokalnie/admin/AdminController.java b/backend/src/main/java/pl/polskalokalnie/admin/AdminController.java
index 5f5bf71..bf7ec66 100644
--- a/backend/src/main/java/pl/polskalokalnie/admin/AdminController.java
+++ b/backend/src/main/java/pl/polskalokalnie/admin/AdminController.java
@@ -183,6 +183,7 @@ public class AdminController {
         if (user.getRole() == Role.ADMIN) {
             throw new ResponseStatusException(HttpStatus.FORBIDDEN, "Nie można usunąć konta administratora");
         }
+        listingService.deleteAllOfOwner(user.getEmail());
         userRepository.delete(user);
     }
 
diff --git a/backend/src/main/java/pl/polskalokalnie/auth/AuthService.java b/backend/src/main/java/pl/polskalokalnie/auth/AuthService.java
index cefefd3..40d8519 100644
--- a/backend/src/main/java/pl/polskalokalnie/auth/AuthService.java
+++ b/backend/src/main/java/pl/polskalokalnie/auth/AuthService.java
@@ -14,6 +14,7 @@ import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.web.server.ResponseStatusException;
 import pl.polskalokalnie.lead.LeadSyncService;
+import pl.polskalokalnie.listing.ListingService;
 import pl.polskalokalnie.moderation.TextModerationService;
 import pl.polskalokalnie.auth.dto.AuthResponse;
 import pl.polskalokalnie.auth.dto.LoginRequest;
@@ -52,6 +53,7 @@ public class AuthService {
     private final PhoneVerificationService phoneVerificationService;
     private final NickService nickService;
     private final UserSettingsService userSettingsService;
+    private final ListingService listingService;
 
     public AuthService(
             UserRepository userRepository,
@@ -64,7 +66,8 @@ public class AuthService {
             AccountEmailService accountEmailService,
             PhoneVerificationService phoneVerificationService,
             NickService nickService,
-            UserSettingsService userSettingsService
+            UserSettingsService userSettingsService,
+            ListingService listingService
     ) {
         this.userRepository = userRepository;
         this.blockedEmailRepository = blockedEmailRepository;
@@ -77,6 +80,7 @@ public class AuthService {
         this.phoneVerificationService = phoneVerificationService;
         this.nickService = nickService;
         this.userSettingsService = userSettingsService;
+        this.listingService = listingService;
     }
 
     @Transactional
@@ -212,8 +216,12 @@ public class AuthService {
      */
     public void resendPhoneOtp(String email) {
         String normalized = normalizeEmail(email);
-        AppUser user = userRepository.findByEmailIgnoreCase(normalized)
-                .orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND, "Użytkownik nie istnieje"));
+        // Endpoint jest publiczny - dla nieznanego adresu odpowiadamy tak samo jak po wyslaniu kodu,
+        // zeby nie dalo sie nim sprawdzac, czy dany e-mail ma konto w serwisie.
+        AppUser user = userRepository.findByEmailIgnoreCase(normalized).orElse(null);
+        if (user == null) {
+            return;
+        }
         if (user.getPhone() == null || user.getPhone().isBlank()) {
             throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Konto nie ma przypisanego numeru telefonu");
         }
@@ -435,6 +443,7 @@ public class AuthService {
         }
 
         userSettingsService.deleteForUser(user.getId());
+        listingService.deleteAllOfOwner(user.getEmail());
         userRepository.delete(user);
     }
 
diff --git a/backend/src/main/java/pl/polskalokalnie/auth/SecurityConfig.java b/backend/src/main/java/pl/polskalokalnie/auth/SecurityConfig.java
index 0cb382e..ba87c9f 100644
--- a/backend/src/main/java/pl/polskalokalnie/auth/SecurityConfig.java
+++ b/backend/src/main/java/pl/polskalokalnie/auth/SecurityConfig.java
@@ -43,9 +43,14 @@ public class SecurityConfig {
                         .requestMatchers(HttpMethod.GET, "/api/fx/rates").permitAll()
                         .requestMatchers(HttpMethod.POST, "/api/advertising-enquiries").permitAll()
                         .requestMatchers(HttpMethod.GET, "/api/gus/company").permitAll()
+                        // GET pokazuje pytanie o potwierdzenie, POST wypisuje (takze z przycisku programu pocztowego).
                         .requestMatchers(HttpMethod.GET, "/api/unsubscribe").permitAll()
+                        .requestMatchers(HttpMethod.POST, "/api/unsubscribe").permitAll()
                         .requestMatchers("/api/auth/me").authenticated()
-                        .requestMatchers(HttpMethod.GET, "/api/listings/mine").authenticated()
+                        // Prywatne listy pod /api/listings - przed publiczna regula GET /api/listings/**,
+                        // ktora inaczej przepuszczala je anonimowo (konczylo sie bledem 500).
+                        .requestMatchers(HttpMethod.GET, "/api/listings/mine", "/api/listings/mine/**",
+                                "/api/listings/favorites").authenticated()
                         .requestMatchers(HttpMethod.GET, "/api/listings", "/api/listings/**").permitAll()
                         // Podglad ogloszenia dla crawlerow social media (Open Graph) - publiczny, tylko GET.
                         .requestMatchers(HttpMethod.GET, "/api/og/**").permitAll()
diff --git a/backend/src/main/java/pl/polskalokalnie/auth/dto/RegisterRequest.java b/backend/src/main/java/pl/polskalokalnie/auth/dto/RegisterRequest.java
index 5a12f45..c16c96a 100644
--- a/backend/src/main/java/pl/polskalokalnie/auth/dto/RegisterRequest.java
+++ b/backend/src/main/java/pl/polskalokalnie/auth/dto/RegisterRequest.java
@@ -7,7 +7,7 @@ import pl.polskalokalnie.user.AccountType;
 
 public record RegisterRequest(
         @NotBlank @Email String email,
-        @NotBlank @Size(min = 6, max = 72) String password,
+        @NotBlank @Size(min = 8, max = 72) String password,
         @NotBlank @Size(max = 120) String fullName,
         AccountType accountType,
         String phone,
diff --git a/backend/src/main/java/pl/polskalokalnie/config/DataSeeder.java b/backend/src/main/java/pl/polskalokalnie/config/DataSeeder.java
index 1142813..f59ecab 100644
--- a/backend/src/main/java/pl/polskalokalnie/config/DataSeeder.java
+++ b/backend/src/main/java/pl/polskalokalnie/config/DataSeeder.java
@@ -147,7 +147,15 @@ public class DataSeeder implements CommandLineRunner {
         String email = adminEmail.trim().toLowerCase();
         AppUser existing = userRepository.findByEmailIgnoreCase(email).orElse(null);
 
+        // Bez hasla w konfiguracji nie zakladamy ani nie resetujemy konta - na produkcji nie ma wartosci
+        // domyslnej, a jawne haslo z repozytorium (Admin123!) nie moze trafic na serwer przez pomylke.
+        boolean passwordMissing = adminPassword == null || adminPassword.isBlank();
+
         if (existing == null) {
+            if (passwordMissing) {
+                log.error("Brak APP_ADMIN_PASSWORD - konto administratora {} NIE zostalo utworzone.", email);
+                return;
+            }
             AppUser admin = new AppUser();
             admin.setEmail(email);
             admin.setFullName(adminName);
@@ -164,6 +172,10 @@ public class DataSeeder implements CommandLineRunner {
         if (!adminResetPassword) {
             return;
         }
+        if (passwordMissing) {
+            log.error("APP_ADMIN_RESET_PASSWORD=true, ale brak APP_ADMIN_PASSWORD - haslo konta {} bez zmian.", email);
+            return;
+        }
 
         // Awaryjne przywrocenie dostepu: haslo, rola i aktywacja wracaja do stanu z konfiguracji.
         // Blokada konta tez znika - inaczej reset hasla nie przywrocilby logowania.
diff --git a/backend/src/main/java/pl/polskalokalnie/listing/ListingController.java b/backend/src/main/java/pl/polskalokalnie/listing/ListingController.java
index 441e90f..47ff828 100644
--- a/backend/src/main/java/pl/polskalokalnie/listing/ListingController.java
+++ b/backend/src/main/java/pl/polskalokalnie/listing/ListingController.java
@@ -1,5 +1,6 @@
 package pl.polskalokalnie.listing;
 
+import jakarta.servlet.http.HttpServletRequest;
 import jakarta.validation.Valid;
 import java.net.URI;
 import java.util.List;
@@ -21,9 +22,11 @@ import org.springframework.web.bind.annotation.RestController;
 public class ListingController {
 
     private final ListingService listingService;
+    private final ListingViewGuard viewGuard;
 
-    public ListingController(ListingService listingService) {
+    public ListingController(ListingService listingService, ListingViewGuard viewGuard) {
         this.listingService = listingService;
+        this.viewGuard = viewGuard;
     }
 
     /**
@@ -56,12 +59,16 @@ public class ListingController {
     public ListingDetailResponse getById(
             @PathVariable Long id,
             @RequestParam(defaultValue = "false") boolean incrementView,
-            Authentication authentication
+            Authentication authentication,
+            HttpServletRequest request
     ) {
         String viewerEmail = authentication == null ? null : authentication.getName();
         boolean viewerIsAdmin = authentication != null && authentication.getAuthorities().stream()
                 .anyMatch(authority -> "ROLE_ADMIN".equals(authority.getAuthority()));
-        return listingService.getById(id, incrementView, viewerEmail, viewerIsAdmin);
+        // Adres klienta ustawia nginx (X-Real-IP) - backend nie jest osiagalny z pominieciem nginx.
+        String viewer = request.getHeader("X-Real-IP") != null ? request.getHeader("X-Real-IP") : request.getRemoteAddr();
+        boolean countView = incrementView && viewGuard.shouldCount(id, viewer);
+        return listingService.getById(id, countView, viewerEmail, viewerIsAdmin);
     }
 
     @PostMapping
@@ -75,7 +82,7 @@ public class ListingController {
                 .body(response);
     }
 
-    // Edycja wlasnego ogloszenia (pelna aktualizacja pol; status bez zmian).
+    // Edycja wlasnego ogloszenia (pelna aktualizacja pol; istotna zmiana tresci wraca do moderacji).
     @PutMapping("/{id}")
     public ListingDetailResponse update(
             @PathVariable Long id,
diff --git a/backend/src/main/java/pl/polskalokalnie/listing/ListingRepository.java b/backend/src/main/java/pl/polskalokalnie/listing/ListingRepository.java
index 5eaea11..238123d 100644
--- a/backend/src/main/java/pl/polskalokalnie/listing/ListingRepository.java
+++ b/backend/src/main/java/pl/polskalokalnie/listing/ListingRepository.java
@@ -6,4 +6,6 @@ import org.springframework.data.jpa.repository.JpaRepository;
 public interface ListingRepository extends JpaRepository<PropertyListing, Long> {
 
     List<PropertyListing> findByOwnerEmailIgnoreCaseAndStatusOrderByCreatedAtDesc(String ownerEmail, ListingStatus status);
+
+    List<PropertyListing> findByOwnerEmailIgnoreCase(String ownerEmail);
 }
diff --git a/backend/src/main/java/pl/polskalokalnie/listing/ListingService.java b/backend/src/main/java/pl/polskalokalnie/listing/ListingService.java
index 0ee9f42..78eceb0 100644
--- a/backend/src/main/java/pl/polskalokalnie/listing/ListingService.java
+++ b/backend/src/main/java/pl/polskalokalnie/listing/ListingService.java
@@ -342,6 +342,17 @@ public class ListingService {
         listingRepository.deleteById(id);
     }
 
+    /**
+     * Usuniecie wszystkich ogloszen konta - przy usuwaniu konta. Bez tego opublikowane ogloszenia
+     * (z imieniem i telefonem wlasciciela) zostawaly w serwisie bez wlasciciela.
+     */
+    @Transactional
+    public void deleteAllOfOwner(String ownerEmail) {
+        if (ownerEmail != null && !ownerEmail.isBlank()) {
+            listingRepository.deleteAll(listingRepository.findByOwnerEmailIgnoreCase(ownerEmail));
+        }
+    }
+
     private static String trimToNull(String value) {
         if (value == null) {
             return null;
diff --git a/backend/src/main/java/pl/polskalokalnie/listing/ListingViewGuard.java b/backend/src/main/java/pl/polskalokalnie/listing/ListingViewGuard.java
new file mode 100644
index 0000000..08828de
--- /dev/null
+++ b/backend/src/main/java/pl/polskalokalnie/listing/ListingViewGuard.java
@@ -0,0 +1,39 @@
+package pl.polskalokalnie.listing;
+
+import java.time.Duration;
+import java.time.Instant;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import org.springframework.stereotype.Component;
+
+/**
+ * Jedno wyswietlenie ogloszenia na adres IP na godzine. Licznik wyswietlen wplywa na ranking
+ * dzielnic i to, co widza sprzedajacy - bez tego dalo sie go dowolnie nabijac odswiezaniem strony.
+ * Pamiec jest ograniczona: po przekroczeniu limitu wpisow stare sa czyszczone.
+ */
+@Component
+public class ListingViewGuard {
+
+    private static final Duration WINDOW = Duration.ofHours(1);
+    private static final int MAX_ENTRIES = 100_000;
+
+    private final Map<String, Instant> lastCounted = new ConcurrentHashMap<>();
+
+    /** true, gdy to wyswietlenie ma sie wliczyc do licznika. */
+    public boolean shouldCount(Long listingId, String viewer) {
+        Instant now = Instant.now();
+        if (lastCounted.size() > MAX_ENTRIES) {
+            lastCounted.values().removeIf(at -> at.isBefore(now.minus(WINDOW)));
+            if (lastCounted.size() > MAX_ENTRIES) {
+                lastCounted.clear();
+            }
+        }
+        String key = listingId + "|" + (viewer == null ? "" : viewer);
+        Instant previous = lastCounted.get(key);
+        if (previous != null && previous.isAfter(now.minus(WINDOW))) {
+            return false;
+        }
+        lastCounted.put(key, now);
+        return true;
+    }
+}
diff --git a/backend/src/main/java/pl/polskalokalnie/message/ConversationService.java b/backend/src/main/java/pl/polskalokalnie/message/ConversationService.java
index c330242..c93cbe3 100644
--- a/backend/src/main/java/pl/polskalokalnie/message/ConversationService.java
+++ b/backend/src/main/java/pl/polskalokalnie/message/ConversationService.java
@@ -59,6 +59,12 @@ public class ConversationService {
     public ConversationDetail start(AppUser me, Long listingId, String content) {
         PropertyListing listing = listingRepository.findById(listingId)
                 .orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND, "Nie znaleziono ogłoszenia"));
+        // Nowa rozmowa tylko o opublikowanym ogloszeniu - inaczej kolejne numery ujawnialy tytul, cene
+        // i sprzedajacego ogloszen oczekujacych, wstrzymanych i odrzuconych. Trwajaca rozmowa zostaje.
+        if (listing.getStatus() != ListingStatus.APPROVED
+                && conversationRepository.findByListingIdAndBuyerId(listingId, me.getId()).isEmpty()) {
+            throw new ResponseStatusException(HttpStatus.NOT_FOUND, "Nie znaleziono ogłoszenia");
+        }
         AppUser seller = listing.getOwnerEmail() == null ? null
                 : userRepository.findByEmailIgnoreCase(listing.getOwnerEmail()).orElse(null);
         if (seller == null) {
diff --git a/backend/src/main/java/pl/polskalokalnie/report/UserReportService.java b/backend/src/main/java/pl/polskalokalnie/report/UserReportService.java
index b17cad6..462ccbe 100644
--- a/backend/src/main/java/pl/polskalokalnie/report/UserReportService.java
+++ b/backend/src/main/java/pl/polskalokalnie/report/UserReportService.java
@@ -7,6 +7,7 @@ import org.springframework.http.HttpStatus;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.web.server.ResponseStatusException;
+import pl.polskalokalnie.listing.ListingService;
 import pl.polskalokalnie.message.Conversation;
 import pl.polskalokalnie.message.ConversationRepository;
 import pl.polskalokalnie.message.Message;
@@ -25,13 +26,16 @@ public class UserReportService {
     private final UserRepository userRepository;
     private final ConversationRepository conversationRepository;
     private final MessageRepository messageRepository;
+    private final ListingService listingService;
 
     public UserReportService(UserReportRepository userReportRepository, UserRepository userRepository,
-                             ConversationRepository conversationRepository, MessageRepository messageRepository) {
+                             ConversationRepository conversationRepository, MessageRepository messageRepository,
+                             ListingService listingService) {
         this.userReportRepository = userReportRepository;
         this.userRepository = userRepository;
         this.conversationRepository = conversationRepository;
         this.messageRepository = messageRepository;
+        this.listingService = listingService;
     }
 
     @Transactional
@@ -102,6 +106,7 @@ public class UserReportService {
             throw new ResponseStatusException(HttpStatus.FORBIDDEN, "Nie można usunąć konta administratora");
         }
 
+        listingService.deleteAllOfOwner(reported.getEmail());
         userRepository.delete(reported);
 
         report.setReportedUserDeleted(true);
diff --git a/backend/src/main/java/pl/polskalokalnie/unsubscribe/UnsubscribeController.java b/backend/src/main/java/pl/polskalokalnie/unsubscribe/UnsubscribeController.java
index bfcbe42..6b63df1 100644
--- a/backend/src/main/java/pl/polskalokalnie/unsubscribe/UnsubscribeController.java
+++ b/backend/src/main/java/pl/polskalokalnie/unsubscribe/UnsubscribeController.java
@@ -2,9 +2,11 @@ package pl.polskalokalnie.unsubscribe;
 
 import org.springframework.http.MediaType;
 import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.util.HtmlUtils;
 
 /**
  * Publiczny endpoint rezygnacji - link z tokenem doklejany do kazdej wiadomosci marketingowej.
@@ -20,17 +22,40 @@ public class UnsubscribeController {
         this.unsubscribeService = unsubscribeService;
     }
 
+    /**
+     * Otwarcie linku tylko pyta o potwierdzenie. Skanery poczty (antywirusy, podglad linkow) same
+     * otwieraja linki z maili - gdyby GET od razu wypisywal, ludzie tracili by subskrypcje bez klikniecia.
+     */
     @GetMapping(produces = MediaType.TEXT_HTML_VALUE)
-    public String unsubscribe(@RequestParam("token") String token) {
-        UnsubscribeService.Result result = unsubscribeService.unsubscribe(token);
-        String kanal = "sms".equals(result.channel()) ? "SMS" : "e-mail";
-        return page("Rezygnacja przyjęta",
-                "Twój adres" + (result.maskedContact().isEmpty() ? "" : " (" + result.maskedContact() + ")")
-                        + " został wypisany z wiadomości marketingowych (" + kanal + "). "
-                        + "Nie będziemy już wysyłać Ci kampanii tym kanałem.");
+    public String confirm(@RequestParam("token") String token) {
+        UnsubscribeService.Result result = unsubscribeService.preview(token);
+        String form = "<form method=\"post\" action=\"/api/unsubscribe?token=" + HtmlUtils.htmlEscape(token) + "\">"
+                + "<button type=\"submit\">Wypisz mnie</button></form>";
+        return page("Rezygnacja z wiadomości",
+                "Czy wypisać " + contact(result) + " z wiadomości marketingowych (" + channel(result) + ")?", form);
     }
 
-    private static String page(String title, String message) {
+    /**
+     * Wlasciwa rezygnacja. Token w adresie, wiec ten sam POST obsluguje tez przycisk "Wypisz sie"
+     * programow pocztowych (List-Unsubscribe-Post, RFC 8058).
+     */
+    @PostMapping(produces = MediaType.TEXT_HTML_VALUE)
+    public String unsubscribe(@RequestParam("token") String token) {
+        UnsubscribeService.Result result = unsubscribeService.unsubscribe(token);
+        return page("Rezygnacja przyjęta",
+                "Twój adres " + contact(result) + " został wypisany z wiadomości marketingowych (" + channel(result) + "). "
+                        + "Nie będziemy już wysyłać Ci kampanii tym kanałem.", "");
+    }
+
+    private static String contact(UnsubscribeService.Result result) {
+        return result.maskedContact().isEmpty() ? "" : "(" + HtmlUtils.htmlEscape(result.maskedContact()) + ")";
+    }
+
+    private static String channel(UnsubscribeService.Result result) {
+        return "sms".equals(result.channel()) ? "SMS" : "e-mail";
+    }
+
+    private static String page(String title, String message, String action) {
         return "<!doctype html><html lang=\"pl\"><head><meta charset=\"utf-8\">"
                 + "<meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">"
                 + "<title>" + title + "</title>"
@@ -38,7 +63,10 @@ public class UnsubscribeController {
                 + "display:flex;min-height:100vh;align-items:center;justify-content:center;padding:24px}"
                 + ".card{background:#fff;max-width:460px;padding:36px 32px;border-radius:16px;"
                 + "box-shadow:0 12px 40px rgba(15,23,42,.12);text-align:center}"
-                + "h1{font-size:20px;color:#0f172a;margin:0 0 12px}p{color:#475569;line-height:1.6;margin:0}</style>"
-                + "</head><body><div class=\"card\"><h1>" + title + "</h1><p>" + message + "</p></div></body></html>";
+                + "h1{font-size:20px;color:#0f172a;margin:0 0 12px}p{color:#475569;line-height:1.6;margin:0}"
+                + "button{margin-top:20px;padding:12px 22px;border:0;border-radius:10px;background:#12a764;color:#fff;"
+                + "font-size:15px;font-weight:600;cursor:pointer}</style>"
+                + "</head><body><div class=\"card\"><h1>" + title + "</h1><p>" + message + "</p>" + action
+                + "</div></body></html>";
     }
 }
diff --git a/backend/src/main/java/pl/polskalokalnie/unsubscribe/UnsubscribeService.java b/backend/src/main/java/pl/polskalokalnie/unsubscribe/UnsubscribeService.java
index c2c80b8..c516f3b 100644
--- a/backend/src/main/java/pl/polskalokalnie/unsubscribe/UnsubscribeService.java
+++ b/backend/src/main/java/pl/polskalokalnie/unsubscribe/UnsubscribeService.java
@@ -41,28 +41,17 @@ public class UnsubscribeService {
         return encodedPayload + "." + sign(encodedPayload);
     }
 
+    /** Sprawdza link bez zmieniania czegokolwiek - do strony z pytaniem o potwierdzenie rezygnacji. */
+    public Result preview(String token) {
+        Target target = parse(token);
+        return new Result(target.channel(), maskContact(target.lead(), target.channel()));
+    }
+
     @Transactional
     public Result unsubscribe(String token) {
-        if (token == null || !token.contains(".")) {
-            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Nieprawidłowy link rezygnacji");
-        }
-        int dot = token.lastIndexOf('.');
-        String encodedPayload = token.substring(0, dot);
-        String signature = token.substring(dot + 1);
-        if (!sign(encodedPayload).equals(signature)) {
-            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Link rezygnacji jest nieprawidłowy lub wygasł");
-        }
-
-        String payload = new String(URL_DECODER.decode(encodedPayload), StandardCharsets.UTF_8);
-        String[] parts = payload.split(":", 2);
-        if (parts.length != 2) {
-            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Nieprawidłowy link rezygnacji");
-        }
-        Long leadId = parseLeadId(parts[0]);
-        String channel = normalizeChannel(parts[1]);
-
-        Lead lead = leadRepository.findById(leadId)
-                .orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND, "Kontakt nie istnieje"));
+        Target target = parse(token);
+        Lead lead = target.lead();
+        String channel = target.channel();
 
         if ("sms".equals(channel)) {
             lead.setSmsOptOut(true);
@@ -76,6 +65,38 @@ public class UnsubscribeService {
         return new Result(channel, maskContact(lead, channel));
     }
 
+    private record Target(Lead lead, String channel) {
+    }
+
+    private Target parse(String token) {
+        if (token == null || !token.contains(".")) {
+            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Nieprawidłowy link rezygnacji");
+        }
+        int dot = token.lastIndexOf('.');
+        String encodedPayload = token.substring(0, dot);
+        String signature = token.substring(dot + 1);
+        // Porownanie w stalym czasie - String.equals konczy sie na pierwszej roznicy i zdradza,
+        // ile poczatkowych znakow podpisu sie zgadza.
+        if (!java.security.MessageDigest.isEqual(sign(encodedPayload).getBytes(StandardCharsets.UTF_8),
+                signature.getBytes(StandardCharsets.UTF_8))) {
+            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Link rezygnacji jest nieprawidłowy lub wygasł");
+        }
+
+        String payload;
+        try {
+            payload = new String(URL_DECODER.decode(encodedPayload), StandardCharsets.UTF_8);
+        } catch (IllegalArgumentException ex) {
+            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Nieprawidłowy link rezygnacji");
+        }
+        String[] parts = payload.split(":", 2);
+        if (parts.length != 2) {
+            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Nieprawidłowy link rezygnacji");
+        }
+        Lead lead = leadRepository.findById(parseLeadId(parts[0]))
+                .orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND, "Kontakt nie istnieje"));
+        return new Target(lead, normalizeChannel(parts[1]));
+    }
+
     private String sign(String data) {
         try {
             Mac mac = Mac.getInstance(HMAC_ALGO);
diff --git a/backend/src/test/java/pl/polskalokalnie/PublicEndpointsSecurityTest.java b/backend/src/test/java/pl/polskalokalnie/PublicEndpointsSecurityTest.java
new file mode 100644
index 0000000..548fea0
--- /dev/null
+++ b/backend/src/test/java/pl/polskalokalnie/PublicEndpointsSecurityTest.java
@@ -0,0 +1,80 @@
+package pl.polskalokalnie;
+
+import static org.hamcrest.Matchers.containsString;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.MediaType;
+import org.springframework.test.web.servlet.MockMvc;
+import pl.polskalokalnie.lead.Lead;
+import pl.polskalokalnie.lead.LeadRepository;
+import pl.polskalokalnie.unsubscribe.UnsubscribeService;
+
+/** Publiczne endpointy - regresje z audytu bezpieczenstwa 2026-09-23. */
+@SpringBootTest
+@AutoConfigureMockMvc
+class PublicEndpointsSecurityTest {
+
+    @Autowired
+    private MockMvc mockMvc;
+    @Autowired
+    private LeadRepository leadRepository;
+    @Autowired
+    private UnsubscribeService unsubscribeService;
+
+    @Test
+    void privateListingListsRequireLogin() throws Exception {
+        // Regresja: publiczna regula GET /api/listings/** przepuszczala je anonimowo (blad 500).
+        mockMvc.perform(get("/api/listings/favorites")).andExpect(status().isForbidden());
+        mockMvc.perform(get("/api/listings/mine/saves")).andExpect(status().isForbidden());
+    }
+
+    @Test
+    void phoneCodeResendDoesNotRevealWhetherAccountExists() throws Exception {
+        // Regresja: nieznany adres dawal 404 "Uzytkownik nie istnieje".
+        mockMvc.perform(post("/api/auth/resend-phone-otp")
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("{\"email\":\"nikogo-takiego@example.com\"}"))
+                .andExpect(status().isNoContent());
+    }
+
+    @Test
+    void registrationRequiresEightCharacterPassword() throws Exception {
+        mockMvc.perform(post("/api/auth/register")
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("{\"email\":\"nowy@example.com\",\"password\":\"abc123\",\"fullName\":\"Jan Nowak\"}"))
+                .andExpect(status().isBadRequest());
+    }
+
+    @Test
+    void openingUnsubscribeLinkOnlyAsksForConfirmation() throws Exception {
+        // Regresja: sam GET (np. skaner linkow w poczcie) wypisywal z mailingu.
+        Lead lead = new Lead();
+        lead.setEmail("subskrybent@example.com");
+        lead.setEmailConsent(true);
+        lead = leadRepository.save(lead);
+        String token = unsubscribeService.generateToken(lead.getId(), "email");
+
+        mockMvc.perform(get("/api/unsubscribe").param("token", token))
+                .andExpect(status().isOk())
+                .andExpect(content().string(containsString("method=\"post\"")));
+        org.assertj.core.api.Assertions.assertThat(leadRepository.findById(lead.getId()).orElseThrow().isEmailOptOut()).isFalse();
+
+        mockMvc.perform(post("/api/unsubscribe").param("token", token))
+                .andExpect(status().isOk())
+                .andExpect(content().string(containsString("Rezygnacja przyjęta")));
+        org.assertj.core.api.Assertions.assertThat(leadRepository.findById(lead.getId()).orElseThrow().isEmailOptOut()).isTrue();
+    }
+
+    @Test
+    void tamperedUnsubscribeTokenIsRejected() throws Exception {
+        mockMvc.perform(post("/api/unsubscribe").param("token", "MTpbZW1haWw.nieprawidlowy-podpis"))
+                .andExpect(status().isBadRequest());
+    }
+}
diff --git a/backend/src/test/java/pl/polskalokalnie/listing/ListingViewGuardTest.java b/backend/src/test/java/pl/polskalokalnie/listing/ListingViewGuardTest.java
new file mode 100644
index 0000000..e905edb
--- /dev/null
+++ b/backend/src/test/java/pl/polskalokalnie/listing/ListingViewGuardTest.java
@@ -0,0 +1,19 @@
+package pl.polskalokalnie.listing;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.jupiter.api.Test;
+
+class ListingViewGuardTest {
+
+    @Test
+    void countsOneViewPerVisitorAndListing() {
+        // Regresja: kazde odswiezenie strony podbijalo licznik wyswietlen.
+        ListingViewGuard guard = new ListingViewGuard();
+
+        assertThat(guard.shouldCount(1L, "203.0.113.1")).isTrue();
+        assertThat(guard.shouldCount(1L, "203.0.113.1")).isFalse();
+        assertThat(guard.shouldCount(1L, "203.0.113.2")).isTrue();
+        assertThat(guard.shouldCount(2L, "203.0.113.1")).isTrue();
+    }
+}
diff --git a/backend/src/test/java/pl/polskalokalnie/message/ConversationStartTest.java b/backend/src/test/java/pl/polskalokalnie/message/ConversationStartTest.java
new file mode 100644
index 0000000..3efefd7
--- /dev/null
+++ b/backend/src/test/java/pl/polskalokalnie/message/ConversationStartTest.java
@@ -0,0 +1,48 @@
+package pl.polskalokalnie.message;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import java.util.Optional;
+import org.junit.jupiter.api.Test;
+import org.springframework.context.ApplicationEventPublisher;
+import org.springframework.http.HttpStatus;
+import org.springframework.test.util.ReflectionTestUtils;
+import org.springframework.web.server.ResponseStatusException;
+import pl.polskalokalnie.listing.ListingRepository;
+import pl.polskalokalnie.listing.ListingStatus;
+import pl.polskalokalnie.listing.PropertyListing;
+import pl.polskalokalnie.moderation.TextModerationService;
+import pl.polskalokalnie.user.AppUser;
+import pl.polskalokalnie.user.UserRepository;
+
+class ConversationStartTest {
+
+    @Test
+    void cannotStartConversationAboutUnpublishedListing() {
+        // Regresja: rozmowa o ogloszeniu oczekujacym/odrzuconym ujawniala jego tytul, cene i sprzedajacego.
+        ConversationRepository conversations = mock(ConversationRepository.class);
+        ListingRepository listings = mock(ListingRepository.class);
+        ConversationService service = new ConversationService(conversations, mock(MessageRepository.class),
+                mock(UserBlockRepository.class), mock(UserRepository.class), listings,
+                mock(TextModerationService.class), mock(ApplicationEventPublisher.class));
+
+        PropertyListing pending = new PropertyListing();
+        pending.setStatus(ListingStatus.PENDING);
+        pending.setOwnerEmail("sprzedajacy@example.com");
+        when(listings.findById(5L)).thenReturn(Optional.of(pending));
+        AppUser me = new AppUser();
+        ReflectionTestUtils.setField(me, "id", 1L);
+        when(conversations.findByListingIdAndBuyerId(5L, 1L)).thenReturn(Optional.empty());
+
+        assertThatThrownBy(() -> service.start(me, 5L, "Dzień dobry"))
+                .isInstanceOfSatisfying(ResponseStatusException.class,
+                        ex -> assertThat(ex.getStatusCode()).isEqualTo(HttpStatus.NOT_FOUND));
+        verify(conversations, never()).save(any());
+    }
+}
diff --git a/docker-compose.prod.yml b/docker-compose.prod.yml
index 4136766..8f037ec 100644
--- a/docker-compose.prod.yml
+++ b/docker-compose.prod.yml
@@ -31,7 +31,9 @@ services:
       # Bez tych zmiennych backend bierze wartosci domyslne z application.yml, wiec login i haslo
       # administratora ustawione w .env nie mialy zadnego wplywu na dzialajaca aplikacje.
       APP_ADMIN_EMAIL: ${APP_ADMIN_EMAIL:-admin@softspm.com}
-      APP_ADMIN_PASSWORD: ${APP_ADMIN_PASSWORD:-Admin123!}
+      # Bez wartosci domyslnej: brak hasla w .env.production oznacza, ze konto administratora nie
+      # zostanie zalozone (blad w logu), zamiast powstac z jawnym haslem z repozytorium.
+      APP_ADMIN_PASSWORD: ${APP_ADMIN_PASSWORD:-}
       APP_ADMIN_NAME: ${APP_ADMIN_NAME:-Administrator Polska Lokalnie}
       # true = przy starcie ustaw haslo administratora na APP_ADMIN_PASSWORD (odzyskanie dostepu).
       APP_ADMIN_RESET_PASSWORD: ${APP_ADMIN_RESET_PASSWORD:-false}
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index 11dd27f..0a306cc 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -12724,7 +12724,7 @@ function LoginPage({ onLogin }: { onLogin: (user: AuthUser) => void }) {
                       value={password}
                       onChange={(event) => setPassword(event.target.value)}
                       autoComplete="new-password"
-                      minLength={6}
+                      minLength={8}
                       required
                     />
                     <button
@@ -12746,7 +12746,7 @@ function LoginPage({ onLogin }: { onLogin: (user: AuthUser) => void }) {
                       value={confirmPassword}
                       onChange={(event) => setConfirmPassword(event.target.value)}
                       autoComplete="new-password"
-                      minLength={6}
+                      minLength={8}
                       required
                     />
                     <button
@@ -12901,7 +12901,7 @@ function LoginPage({ onLogin }: { onLogin: (user: AuthUser) => void }) {
                       value={password}
                       onChange={(event) => setPassword(event.target.value)}
                       autoComplete="new-password"
-                      minLength={6}
+                      minLength={8}
                       required
                     />
                     <button
@@ -12923,7 +12923,7 @@ function LoginPage({ onLogin }: { onLogin: (user: AuthUser) => void }) {
                       value={confirmPassword}
                       onChange={(event) => setConfirmPassword(event.target.value)}
                       autoComplete="new-password"
-                      minLength={6}
+                      minLength={8}
                       required
                     />
                     <button