CVE-2025-62721
📋 TL;DR
This vulnerability in LinkAce allows any authenticated user to access all links, lists, and tags from all users in the system, regardless of ownership or visibility settings. It affects LinkAce versions 2.3.1 and below where RSS feed endpoints lack proper authorization checks. This exposes sensitive user data to unauthorized access within the application.
💻 Affected Systems
- LinkAce
📦 What is this software?
Linkace by Linkace
⚠️ Risk & Real-World Impact
Worst Case
Complete exposure of all user data including private links, lists, and tags to any authenticated attacker, potentially leading to data theft, privacy violations, and reputational damage.
Likely Case
Unauthorized users accessing sensitive information from other users, violating data privacy and potentially exposing confidential or personal information.
If Mitigated
Limited impact with proper network segmentation and monitoring, though data exposure risk remains if exploited.
🎯 Exploit Status
Exploitation requires authenticated access but is straightforward once authenticated. No public exploit code identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.4.0
Vendor Advisory: https://github.com/Kovah/LinkAce/security/advisories/GHSA-47g2-qw6q-cr96
Restart Required: Yes
Instructions:
1. Backup your LinkAce database and configuration. 2. Update to version 2.4.0 via git pull or download from releases. 3. Run 'composer install --no-dev' to update dependencies. 4. Run 'php artisan migrate' to apply database migrations. 5. Restart your web server.
🔧 Temporary Workarounds
Disable RSS feed endpoints
allTemporarily disable RSS feed functionality to prevent exploitation while planning upgrade.
Edit web server configuration to block access to /feed/* endpoints
Restrict authenticated user access
allLimit which users can authenticate to the system while vulnerable.
Review and restrict user accounts to only essential personnel
🧯 If You Can't Patch
- Implement strict network segmentation to isolate LinkAce from untrusted networks
- Enable detailed logging and monitoring for unauthorized access attempts to feed endpoints
🔍 How to Verify
Check if Vulnerable:
Check LinkAce version via admin interface or by examining the application files. Versions 2.3.1 or below are vulnerable.Check Version:
Check LinkAce admin dashboard or examine config/app.php for version informationVerify Fix Applied:
After upgrading to 2.4.0, test that authenticated users can only access their own data through RSS feed endpoints.📡 Detection & Monitoring
Log Indicators:
- Multiple unauthorized access attempts to /feed/* endpoints from single user accounts
- Unusual data access patterns in application logs
Network Indicators:
- HTTP requests to RSS feed endpoints with different user session tokens accessing same resources
SIEM Query:
source="linkace_logs" AND (uri_path="/feed/*") AND user_id!=resource_owner_id