CVE-2025-34436
📋 TL;DR
AVideo versions before 20.1 contain an insecure direct object reference vulnerability that allows any authenticated user to upload files into other users' directories. This occurs because the upload functionality verifies authentication but doesn't enforce ownership checks. All AVideo installations running vulnerable versions are affected.
💻 Affected Systems
- AVideo
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An attacker could upload malicious files (webshells, malware) into other users' directories, potentially leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Attackers upload malicious files to compromise other user accounts, deface content, or establish persistence for further attacks.
If Mitigated
With proper access controls and monitoring, impact is limited to unauthorized file uploads that can be detected and cleaned.
🎯 Exploit Status
Exploitation requires authenticated access but is straightforward once authenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 20.1
Vendor Advisory: https://github.com/WWBN/AVideo/commit/4a53ab2056
Restart Required: No
Instructions:
1. Backup your AVideo installation and database. 2. Update to AVideo version 20.1 or later. 3. Verify the patch is applied by checking for the ownership validation in upload functionality.
🔧 Temporary Workarounds
Restrict file upload permissions
allTemporarily disable file upload functionality for non-admin users
Modify AVideo configuration to restrict upload permissions
Implement web application firewall rules
allBlock suspicious file upload patterns and directory traversal attempts
Configure WAF to block requests with suspicious file upload parameters
🧯 If You Can't Patch
- Implement strict access controls and monitor all file upload activities
- Restrict user permissions and implement file integrity monitoring
🔍 How to Verify
Check if Vulnerable:
Check if AVideo version is below 20.1 and test authenticated file upload to other user directoriesCheck Version:
Check AVideo configuration or admin panel for version informationVerify Fix Applied:
Verify version is 20.1 or later and test that authenticated users cannot upload to other users' directories📡 Detection & Monitoring
Log Indicators:
- Unauthorized file upload attempts
- File uploads to unexpected directories
- Multiple failed upload attempts
Network Indicators:
- Unusual file upload patterns
- Requests to upload endpoints with modified parameters
SIEM Query:
source="avideo.logs" AND (event="file_upload" AND user_id!=directory_owner)