CVE-2025-43742
📋 TL;DR
A reflected cross-site scripting (XSS) vulnerability in Liferay Portal and DXP allows unauthenticated remote attackers to inject malicious JavaScript via friendly URLs. This could enable session hijacking, credential theft, or content manipulation for users who click specially crafted links. Affected versions include Liferay Portal 7.4.0-7.4.3.132 and multiple DXP versions from 2024.Q1 through 2025.Q1.
💻 Affected Systems
- Liferay Portal
- Liferay DXP
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attacker steals administrator session cookies, gains full control of the portal, and deploys backdoors or exfiltrates sensitive data.
Likely Case
Attacker steals user session cookies to impersonate legitimate users, potentially accessing sensitive information or performing unauthorized actions.
If Mitigated
With proper input validation and output encoding, the attack fails to execute JavaScript, resulting in no impact beyond failed exploitation attempts.
🎯 Exploit Status
Exploitation requires crafting malicious URLs and convincing users to click them. No authentication is needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Liferay Portal 7.4.3.133+, Liferay DXP 2025.Q1.4+, 2024.Q4.8+, 2024.Q3.14+, 2024.Q2.14+, 2024.Q1.15+, and 7.4 update 93+
Vendor Advisory: https://liferay.dev/portal/security/known-vulnerabilities/-/asset_publisher/jekt/content/CVE-2025-43742
Restart Required: No
Instructions:
1. Download the appropriate fix pack from Liferay's customer portal. 2. Apply the fix pack following Liferay's deployment documentation. 3. Verify the patch is applied by checking the version.
🔧 Temporary Workarounds
Implement Content Security Policy (CSP)
allAdd a Content Security Policy header to restrict script execution from untrusted sources.
Add to web.xml or server configuration: Content-Security-Policy: script-src 'self'
Input Validation Filter
allDeploy a servlet filter to sanitize friendly URL parameters before processing.
Implement custom filter to validate and encode URL parameters using OWASP Java Encoder
🧯 If You Can't Patch
- Deploy a Web Application Firewall (WAF) with XSS protection rules enabled.
- Educate users about phishing risks and implement URL filtering to block malicious links.
🔍 How to Verify
Check if Vulnerable:
Test by attempting to inject JavaScript via friendly URL parameters and checking if it executes in the response.Check Version:
Check Liferay version via Control Panel → Configuration → Server Administration → System InformationVerify Fix Applied:
After patching, repeat the test; JavaScript should be properly encoded and not execute.📡 Detection & Monitoring
Log Indicators:
- Unusual URL patterns with script tags or JavaScript in friendly URL parameters in access logs
Network Indicators:
- HTTP requests containing suspicious JavaScript payloads in URL parameters
SIEM Query:
source="liferay_access.log" AND (url="*<script*" OR url="*javascript:*" OR url="*onerror=*" OR url="*onload=*")