CVE-2025-43819
📋 TL;DR
This vulnerability allows remote unauthenticated attackers to reuse expired user sessions through the Single Logout (SLO) API in affected Liferay versions. Attackers can potentially hijack user sessions and gain unauthorized access to portal functionality. Organizations running vulnerable Liferay Portal or DXP installations are affected.
💻 Affected Systems
- Liferay Portal
- Liferay DXP
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain administrative privileges by hijacking administrator sessions, leading to complete system compromise, data theft, and unauthorized configuration changes.
Likely Case
Attackers hijack regular user sessions to access sensitive data, perform unauthorized actions, or escalate privileges within the portal.
If Mitigated
With proper session management controls and network segmentation, impact is limited to session hijacking within the portal's authorization boundaries.
🎯 Exploit Status
Exploitation requires network access to the SLO API endpoint but no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Liferay Portal 7.4.3.122+, Liferay DXP 2024.Q4.4+, 2024.Q3.14+, 2024.Q2.14+, 2024.Q1.13+
Vendor Advisory: https://liferay.dev/portal/security/known-vulnerabilities/-/asset_publisher/jekt/content/CVE-2025-43819
Restart Required: Yes
Instructions:
1. Download the appropriate fix pack from Liferay's customer portal. 2. Apply the fix pack following Liferay's deployment guide. 3. Restart the Liferay server. 4. Verify the patch is applied correctly.
🔧 Temporary Workarounds
Disable SLO API
allTemporarily disable the Single Logout API if not required for your deployment.
Modify portal-ext.properties: session.disabled=true
Network Access Control
linuxRestrict network access to the SLO API endpoint using firewall rules.
iptables -A INPUT -p tcp --dport 8080 -m string --string "/api/jsonws/session" --algo bm -j DROP
🧯 If You Can't Patch
- Implement strict session timeout policies (e.g., 15-minute maximum session duration)
- Deploy Web Application Firewall (WAF) with session fixation protection rules
🔍 How to Verify
Check if Vulnerable:
Check Liferay version via Control Panel → Configuration → Server Administration → System InformationCheck Version:
curl -s http://localhost:8080/api/jsonws/invoke?cmd=version | grep build.numberVerify Fix Applied:
Verify version is updated to patched version and test SLO API functionality📡 Detection & Monitoring
Log Indicators:
- Multiple SLO API requests from same IP with different session IDs
- Session reuse patterns in authentication logs
Network Indicators:
- Unusual SLO API traffic patterns
- Session ID reuse in HTTP headers
SIEM Query:
source="liferay.log" AND "SingleLogoutService" AND ("session" OR "SLO")