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The CVE-2025-45627 vulnerability is a stored Cross-site Scripting (XSS) flaw within Liferay’s Mentions Web functionality. It arises from insufficient input sanitization and output encoding of user-supplied data. An attacker, who must be an authenticated user, can inject malicious JavaScript payloads into specific text fields, namely a user’s first, middle, or last name. When this crafted name is subsequently mentioned in various portal components like page comments, blog comments, or message boards, the malicious script is stored on the server. The payload then executes in the browser of any other user who views the page containing the malicious mention. This allows the attacker to perform actions on behalf of the victim, potentially leading to session hijacking, defacement, or data theft.
Platform: Liferay Portal/DXP
Version: < 6.0.35, 7.4.0-7.4.3.111
Vulnerability: Stored XSS
Severity: Moderate
date: 2025-10-13
Prediction: 2025-10-27
What Undercode Say:
curl -s "https://api.github.com/advisories" | jq '.[] | select(.severity=="MODERATE")' | grep -A 10 -B 10 "Liferay"
// Example of unsanitized input leading to the vulnerability
const userName = userInputName; // e.g., <code><script>alert('XSS')</script>John</code>;
document.getElementById('mention').innerHTML = <code>@${userName}</code>;
How Exploit:
1. Attacker logs into the Liferay portal.
- Edits their profile’s “First Name” field to:
<script>stealCookie()</script>.
3. Posts a comment mentioning their own username.
- Victim views the comment; the malicious script executes.
Protection from this CVE
Upgrade to Liferay Portal/ DXP patched versions (e.g., 6.0.35).
Implement strict content security policies (CSP).
Apply rigorous server-side input validation and context-aware output encoding for all user-controlled data displayed in web views.
Impact:
Session hijacking, unauthorized actions, data exfiltration, account takeover.
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Sources:
Reported By: github.com
Extra Source Hub:
Undercode
