CVE-2025-34440
📋 TL;DR
AVideo versions before 20.1 contain an open redirect vulnerability in the user registration process. Attackers can manipulate the siteRedirectUri parameter to redirect users to malicious external websites, enabling phishing attacks. This affects all AVideo installations running vulnerable versions.
💻 Affected Systems
- AVideo
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Users are redirected to sophisticated phishing sites that steal credentials or deliver malware, leading to account compromise or system infection.
Likely Case
Attackers use the redirect for phishing campaigns to harvest user credentials or distribute malicious links.
If Mitigated
With proper user awareness training and browser security settings, impact is limited to potential confusion or minor inconvenience.
🎯 Exploit Status
Exploitation requires user interaction (clicking a crafted link) but is technically simple.
🛠️ 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. 2. Update to AVideo version 20.1 or later. 3. Verify the patch by checking the commit references.
🔧 Temporary Workarounds
Input Validation Filter
allAdd server-side validation to reject external URLs in the siteRedirectUri parameter.
Modify user registration handling code to validate redirect URLs against allowed domains only.
🧯 If You Can't Patch
- Implement WAF rules to block requests containing external URLs in the siteRedirectUri parameter.
- Educate users about phishing risks and advise them to verify URLs before clicking.
🔍 How to Verify
Check if Vulnerable:
Test by attempting to register with a siteRedirectUri parameter pointing to an external domain like https://evil.com.Check Version:
Check AVideo version in admin panel or via version file in installation directory.Verify Fix Applied:
After patching, repeat the vulnerable test; the redirect should be blocked or sanitized.📡 Detection & Monitoring
Log Indicators:
- HTTP requests with siteRedirectUri parameter containing external domains in registration logs.
Network Indicators:
- Redirects from AVideo registration page to unexpected external domains.
SIEM Query:
source="avideo_logs" AND "siteRedirectUri" AND (url="*http://*" OR url="*https://*") NOT url="*yourdomain.com*"