CVE-2025-62240
📋 TL;DR
This CVE describes multiple cross-site scripting (XSS) vulnerabilities in Liferay Portal and DXP calendar events. Attackers can inject malicious scripts into user name fields (First, Middle, Last) that execute when other users view calendar events. Organizations running affected Liferay versions with calendar functionality enabled are vulnerable.
💻 Affected Systems
- Liferay Portal
- Liferay DXP
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, perform actions as authenticated users, redirect to malicious sites, or install malware on user systems via browser exploitation.
Likely Case
Attackers would typically steal session cookies to hijack user accounts, deface calendar pages, or redirect users to phishing sites.
If Mitigated
With proper input validation and output encoding, the malicious payloads would be rendered harmless as text rather than executable code.
🎯 Exploit Status
Exploitation requires the attacker to have user account creation/modification privileges or compromise existing accounts to inject payloads into name fields.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Liferay Portal 7.4.3.112+, Liferay DXP 2023.Q4.6+, 2023.Q3.8+, 7.4 update 93+, 7.3 update 37+
Vendor Advisory: https://liferay.dev/portal/security/known-vulnerabilities/-/asset_publisher/jekt/content/CVE-2025-62240
Restart Required: No
Instructions:
1. Download the appropriate fix pack from Liferay's customer portal. 2. Apply the fix pack according to Liferay's deployment documentation. 3. Verify the patch was applied successfully.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side input validation to sanitize user name fields before storage
Implement custom portlet filter or hook to sanitize user input in name fields
Output Encoding
allEnsure all user-controlled data displayed in calendar views is properly HTML-encoded
Modify calendar display templates to use Liferay's escape methods like HtmlUtil.escape()
🧯 If You Can't Patch
- Disable calendar functionality if not essential for business operations
- Implement web application firewall (WAF) rules to block XSS payloads in user name parameters
🔍 How to Verify
Check if Vulnerable:
Check Liferay version via Control Panel → Configuration → Server Administration → System InformationCheck Version:
Check liferay.home/portal-ext.properties or Control Panel system informationVerify Fix Applied:
After patching, attempt to inject basic XSS payloads (e.g., <script>alert('test')</script>) into user name fields and verify they are properly sanitized when displayed📡 Detection & Monitoring
Log Indicators:
- Unusual patterns in user profile updates, especially name field modifications with script-like content
Network Indicators:
- HTTP requests containing script tags or JavaScript in name parameter values
SIEM Query:
source="liferay" AND (message="*<script>*" OR message="*javascript:*") AND (parameter="firstName" OR parameter="middleName" OR parameter="lastName")