CVE-2025-14691
📋 TL;DR
This vulnerability allows attackers to inject malicious scripts into Mayan EDMS web interface through the /authentication/ endpoint. When exploited, it enables cross-site scripting attacks that can steal user sessions, redirect users, or deface the application. All Mayan EDMS deployments up to version 4.10.1 are affected.
💻 Affected Systems
- Mayan EDMS
📦 What is this software?
Mayan Edms by Mayan Edms
⚠️ Risk & Real-World Impact
Worst Case
Attackers steal administrator credentials, gain full control of the EDMS system, and exfiltrate all stored documents and metadata.
Likely Case
Attackers steal user session cookies to impersonate legitimate users, potentially accessing sensitive documents and performing unauthorized actions.
If Mitigated
With proper input validation and output encoding, the attack fails to execute malicious scripts, limiting impact to attempted exploitation logs.
🎯 Exploit Status
Public proof-of-concept available on GitHub, remote exploitation confirmed, and attack requires minimal technical skill.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.10.2
Vendor Advisory: https://docs.mayan-edms.com/chapters/releases/4.10.2.html#security
Restart Required: Yes
Instructions:
1. Backup your Mayan EDMS installation and database. 2. Upgrade to version 4.10.2 using pip: 'pip install mayan-edms==4.10.2'. 3. Restart the Mayan EDMS service. 4. Verify the upgrade completed successfully.
🔧 Temporary Workarounds
Web Application Firewall (WAF) Rules
allImplement WAF rules to block XSS payloads targeting /authentication/ endpoint
Content Security Policy
allImplement strict CSP headers to prevent script execution from untrusted sources
🧯 If You Can't Patch
- Implement network segmentation to restrict access to Mayan EDMS only to trusted users
- Enable strict input validation and output encoding for all user-controllable inputs
🔍 How to Verify
Check if Vulnerable:
Check Mayan EDMS version: if version <= 4.10.1, system is vulnerable. Test by attempting XSS payload injection at /authentication/ endpoint.Check Version:
python -c "import mayan; print(mayan.__version__)" or check Mayan EDMS admin interfaceVerify Fix Applied:
Confirm version is 4.10.2 or higher. Test that XSS payloads no longer execute when injected into /authentication/ endpoint.📡 Detection & Monitoring
Log Indicators:
- Unusual POST/GET requests to /authentication/ with script tags or JavaScript payloads
- Multiple failed authentication attempts with suspicious parameters
Network Indicators:
- HTTP requests containing <script>, javascript:, or other XSS payloads targeting /authentication/
SIEM Query:
source="mayan_edms" AND (uri_path="/authentication/" AND (request_body CONTAINS "<script>" OR request_body CONTAINS "javascript:"))