CVE-2025-34437
📋 TL;DR
This vulnerability allows any authenticated user to upload comment images to videos owned by other users in AVideo. Attackers can perform unauthorized uploads to arbitrary video objects due to missing ownership checks. All AVideo instances running versions before 20.1 are affected.
💻 Affected Systems
- AVideo
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could upload malicious images to any video, potentially leading to content manipulation, defacement, or serving malicious content to viewers.
Likely Case
Unauthorized users upload inappropriate or spam images to videos they don't own, disrupting content integrity and user experience.
If Mitigated
With proper authentication and authorization controls, only video owners can upload comment images, maintaining content integrity.
🎯 Exploit Status
Exploitation requires authenticated access but is straightforward once authenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 20.1 and later
Vendor Advisory: https://github.com/WWBN/AVideo/commit/4a53ab2056
Restart Required: No
Instructions:
1. Update AVideo to version 20.1 or later. 2. Apply the security patches from the referenced GitHub commits. 3. Verify the fix by testing comment image upload functionality.
🔧 Temporary Workarounds
Disable comment image uploads
allTemporarily disable the comment image upload feature until patching is complete.
Modify AVideo configuration to disable comment image uploads in admin panel
🧯 If You Can't Patch
- Implement strict access controls and monitoring for comment image upload endpoints
- Use web application firewall rules to detect and block unauthorized upload attempts
🔍 How to Verify
Check if Vulnerable:
Test if authenticated users can upload comment images to videos they don't own.Check Version:
Check AVideo version in admin panel or configuration filesVerify Fix Applied:
Verify that only video owners can upload comment images after applying the patch.📡 Detection & Monitoring
Log Indicators:
- Multiple failed upload attempts from same user
- Uploads to videos not owned by the uploading user
Network Indicators:
- Unusual POST requests to comment image upload endpoints
SIEM Query:
source="avideo_logs" AND (event="comment_image_upload" AND user_id != video_owner_id)