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+# PostgreSQL Default Login   
+
+## Description  
+
+PostgreSQL services configured with default or weak credentials present a significant security risk. Attackers can exploit these misconfigurations to gain unauthorized access, extract sensitive data, modify records, or execute arbitrary SQL commands.
+
+## References  
+
+- [PostgreSQL Password Authentication](https://goteleport.com/learn/postgres-password-authentication/)  
+- [PostgreSQL Authentication Documentation](https://www.postgresql.org/docs/current/auth-methods.html)  
+- [Common Default PostgreSQL Credentials](https://github.com/danielmiessler/SecLists/blob/master/Passwords/Default-Credentials/postgres-betterdefaultpasslist.txt)  
+
+## Vulnerable Setup  
+
+
+- Execute the following commands to start a PostgreSQL server
+
+```bash
+docker-compose up -d
+```
+
+Once the server starts, PostgreSQL will be accessible on **port 5432** with default credentials (`postgres:postgres`).  
+
+## Exploitation Steps  
+
+
+- Brute-Force Authentication using **Hydra** with common credentials
+
+    ```bash
+    hydra -C <wordlist> <target-ip> postgres
+    ```
+    ![image](https://github.com/user-attachments/assets/8ef29fa6-0d0c-4beb-a476-6c3f2ad896d0)
+
+## Steps to Write Nuclei Template
+
+**Pre-Condition Check**
+
+```yaml
+pre-condition: |
+  var m = require("nuclei/postgres");
+  var c = m.PGClient();
+  c.IsPostgres(Host, Port);
+```
+
+- Ensures the PostgreSQL service is running before attempting authentication.
+
+**JavaScript Execution Block**
+
+```yaml
+code: |
+  var m = require("nuclei/postgres");
+  var c = m.postgres();
+  c.Connect(Host, Port, User, Pass);
+```
+
+- Loads the PostgreSQL module for Nuclei.  
+- Initializes a PostgreSQL client.  
+- Attempts to authenticate using various username and password combinations.  
+
+**Define Target Arguments**
+
+
+```yaml
+args:
+  Host: "{{Host}}"
+  Port: "5432"
+  User: "{{usernames}}"
+  Pass: "{{passwords}}"
+```
+
+- Specifies the target host and PostgreSQL service port (default: **5432**).  
+- Uses a predefined list of common usernames and passwords.  
+
+**Attack Mode**
+```yml
+attack: clusterbomb
+```
+- This mode systematically tests all combinations of usernames and passwords.  
+
+
+**Payloads**
+
+```yaml
+payloads:
+      usernames:
+        - "postgres"
+        - "admin"
+      passwords:
+        - "password"
+        - "secret"
+        - "admin"
+        - "postgres"
+```
+- Uses commonly found weak credentials.
+
+**Stopping Execution on First Match**
+
+```yaml
+stop-at-first-match: true
+```
+- Terminates the scan once valid credentials are discovered.  
+
+
+
+## Nuclei Template URL : [postgres-default-logins](https://github.com/projectdiscovery/nuclei-templates/blob/main/javascript/default-logins/postgres-default-logins.yaml)
+
+## Nuclei Command:
+
+```bash
+nuclei -id postgres-default-logins -u localhost -vv
+```
+![image](https://github.com/user-attachments/assets/77ac5c46-5780-4eb4-9a4b-5ad24ec16bc7)
diff --git a/javascript/default-logins/postgres-default-logins/docker-compose.yml b/javascript/default-logins/postgres-default-logins/docker-compose.yml
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+version: '3.8'
+services:
+  db:
+    image: postgres:latest
+    container_name: postgres
+    restart: always
+    environment:
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
+      POSTGRES_DB: postgres
+    ports:
+      - "5432:5432"
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