CVE-2025-62719
📋 TL;DR
This SSRF vulnerability in LinkAce allows authenticated attackers to make the application server send HTTP requests to internal network resources, enabling port scanning and service discovery. The impact is limited because the function only extracts HTML meta keywords, preventing meaningful data exfiltration. Only LinkAce instances running versions 2.3.0 or below are affected.
💻 Affected Systems
- LinkAce
📦 What is this software?
Linkace by Linkace
⚠️ Risk & Real-World Impact
Worst Case
Attackers could map internal network services and identify vulnerable internal systems for further attacks, though data exfiltration is prevented by the limited response parsing.
Likely Case
Internal network reconnaissance and port scanning, potentially identifying other vulnerable services within the same network segment.
If Mitigated
With proper network segmentation and access controls, impact would be limited to the application server's own network segment.
🎯 Exploit Status
Exploitation requires authenticated access and knowledge of internal network addresses. The limited response parsing reduces attack utility.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.4.0
Vendor Advisory: https://github.com/Kovah/LinkAce/security/advisories/GHSA-473x-rmm6-mc8c
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 database migrations: php artisan migrate. 4. Restart the web server and any workers.
🔧 Temporary Workarounds
Network Segmentation
allRestrict outbound network access from the LinkAce server to only necessary external resources
Authentication Restriction
allLimit user accounts and implement strong authentication controls to reduce attack surface
🧯 If You Can't Patch
- Implement strict network egress filtering to block the LinkAce server from accessing internal network resources
- Monitor for unusual outbound HTTP requests from the LinkAce server to internal IP ranges
🔍 How to Verify
Check if Vulnerable:
Check LinkAce version in admin panel or via command: php artisan --version. If version is 2.3.0 or below, you are vulnerable.Check Version:
php artisan --versionVerify Fix Applied:
After updating, verify version is 2.4.0 or higher and test that the htmlKeywordsFromUrl function properly validates URLs.📡 Detection & Monitoring
Log Indicators:
- HTTP requests from LinkAce server to internal IP addresses
- Multiple failed connection attempts to different internal ports
Network Indicators:
- Unusual outbound HTTP traffic from LinkAce server to internal network ranges
- Port scanning patterns from application server
SIEM Query:
source="linkace-logs" AND (dest_ip=10.* OR dest_ip=172.16.* OR dest_ip=192.168.*) AND http_request