CVE-2026-30842
📋 TL;DR
CVE-2026-30842 is an authorization bypass vulnerability in Wallos that allows authenticated users to delete avatar files uploaded by other users. The avatar deletion endpoint fails to verify ownership, enabling any authenticated user who knows another user's avatar filename to delete it. This affects all Wallos instances running versions prior to 4.6.2.
💻 Affected Systems
- Wallos
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Malicious authenticated users could systematically delete all user avatars, causing service disruption and potential data loss if avatars contain important metadata or are linked to critical functionality.
Likely Case
Authenticated users deleting other users' avatars, causing minor service disruption and user inconvenience.
If Mitigated
Limited to authenticated users with knowledge of specific filenames, causing minimal impact if avatars are non-critical and backups exist.
🎯 Exploit Status
Exploitation requires authenticated access and knowledge of target avatar filenames. No public exploit code has been identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.6.2
Vendor Advisory: https://github.com/ellite/Wallos/security/advisories/GHSA-qw24-3pxr-3j6r
Restart Required: Yes
Instructions:
1. Backup your Wallos instance and database. 2. Download Wallos version 4.6.2 from the official repository. 3. Replace existing files with the new version. 4. Restart the web server/service. 5. Verify the patch is applied by checking the version.
🔧 Temporary Workarounds
Disable avatar uploads
allTemporarily disable avatar upload functionality to prevent exploitation.
Modify Wallos configuration to disable avatar uploads or restrict avatar directory permissions
Restrict avatar directory permissions
linuxSet strict file permissions on the avatar upload directory to prevent deletion.
chmod 755 /path/to/wallos/avatars
chown www-data:www-data /path/to/wallos/avatars
🧯 If You Can't Patch
- Implement strict access controls and monitoring on the avatar directory.
- Disable avatar functionality entirely until patching is possible.
🔍 How to Verify
Check if Vulnerable:
Check Wallos version via admin interface or by examining the application files. Versions below 4.6.2 are vulnerable.Check Version:
Check the Wallos admin dashboard or examine the application's version file if available.Verify Fix Applied:
After updating to 4.6.2, test that authenticated users cannot delete avatars belonging to other users.📡 Detection & Monitoring
Log Indicators:
- Unusual DELETE requests to avatar endpoints
- Multiple failed avatar deletion attempts
- Avatar file deletion logs showing cross-user activity
Network Indicators:
- HTTP DELETE requests to /avatars/ endpoint with different user IDs
SIEM Query:
source="wallos_logs" AND (action="delete_avatar" AND user_id!=target_user_id)