CVE-2025-4599
📋 TL;DR
This vulnerability allows remote unauthenticated attackers to execute cross-site scripting (XSS) attacks via the fragment preview functionality in Liferay Portal/DXP. Attackers can inject malicious JavaScript into fragment portlet URLs, potentially compromising user sessions and data. Affected systems include Liferay Portal 7.4.3.61-7.4.3.132 and multiple Liferay DXP versions from 2024.Q1 through 2024.Q4.
💻 Affected Systems
- Liferay Portal
- Liferay DXP
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete account takeover, session hijacking, data theft, and potential privilege escalation if combined with other vulnerabilities.
Likely Case
Session hijacking, credential theft, defacement of portal pages, and client-side data exfiltration.
If Mitigated
Limited impact if proper content security policies and input validation are implemented.
🎯 Exploit Status
Exploitation requires crafting malicious fragment URLs and social engineering to trick users into visiting them.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Liferay Portal 7.4.3.133+, Liferay DXP 2024.Q4.6+, 2024.Q3.14+, 2024.Q2.14+, 2024.Q1.14+, 7.4 update 93+
Vendor Advisory: https://liferay.dev/portal/security/known-vulnerabilities/-/asset_publisher/jekt/content/CVE-2025-4599
Restart Required: No
Instructions:
1. Download the appropriate patch from Liferay's customer portal. 2. Apply the patch using Liferay's patching tool. 3. Verify the patch was applied successfully.
🔧 Temporary Workarounds
Disable Fragment Preview
allTemporarily disable the fragment preview functionality to prevent exploitation.
Navigate to Control Panel > Configuration > System Settings > Fragments > Fragment Preview and disable the feature
Implement Content Security Policy
allAdd strict CSP headers to prevent script execution from untrusted sources.
Add 'Content-Security-Policy: script-src 'self'' to web server configuration
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block malicious fragment URLs
- Monitor for suspicious fragment preview activity and implement user education about suspicious links
🔍 How to Verify
Check if Vulnerable:
Check Liferay version in Control Panel > Server Administration > Properties. Compare against affected version ranges.Check Version:
Check liferay.home/portal/version or Control Panel > Server Administration > PropertiesVerify Fix Applied:
Verify version is patched (7.4.3.133+ for Portal, appropriate Q releases for DXP) and test fragment preview functionality with test payloads.📡 Detection & Monitoring
Log Indicators:
- Unusual fragment preview requests
- POST requests with JavaScript payloads in fragment parameters
- Error logs showing script execution attempts
Network Indicators:
- HTTP requests containing 'fragment' or 'preview' parameters with script tags
- Unusual outbound connections from portal to external domains
SIEM Query:
source="liferay.logs" AND ("fragment preview" OR "script" OR "javascript") AND status=200