CVE-2025-0747
📋 TL;DR
A stored XSS vulnerability in EmbedAI allows authenticated attackers to inject malicious JavaScript into chat messages. When other users view these messages, the script executes in their browsers, potentially compromising their accounts. This affects all EmbedAI instances with vulnerable versions.
💻 Affected Systems
- EmbedAI
📦 What is this software?
Embedai by Thesamur
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, perform account takeovers, redirect users to malicious sites, or deploy ransomware through the chat interface.
Likely Case
Attackers will steal session tokens to hijack user accounts, potentially accessing sensitive chat data and performing unauthorized actions.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before execution, preventing exploitation.
🎯 Exploit Status
Exploitation requires authenticated access and knowledge of XSS payloads that bypass existing filters.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched version
Vendor Advisory: https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-embedai
Restart Required: No
Instructions:
1. Review the vendor advisory. 2. Update EmbedAI to the latest patched version. 3. Verify the fix by testing XSS payloads in chat messages.
🔧 Temporary Workarounds
Implement Content Security Policy
allAdd a strict CSP header to restrict script execution sources
Content-Security-Policy: script-src 'self'
Enable Input Validation
allSanitize all user input in chat messages before storage
🧯 If You Can't Patch
- Restrict chat functionality to trusted users only
- Implement web application firewall rules to block XSS payloads
🔍 How to Verify
Check if Vulnerable:
Test by submitting a basic XSS payload like <script>alert('XSS')</script> in a chat message and checking if it executes when viewed.Check Version:
Check EmbedAI admin panel or configuration files for version informationVerify Fix Applied:
After patching, repeat the XSS test to confirm payloads are properly sanitized and don't execute.📡 Detection & Monitoring
Log Indicators:
- Unusual chat message patterns with script tags or JavaScript code
- Multiple failed login attempts followed by chat activity
Network Indicators:
- Outbound connections to suspicious domains from chat interface
- Unusual JavaScript file requests
SIEM Query:
source="embedai" AND (message="*<script>*" OR message="*javascript:*")