CVE-2025-62248: Liferay DXP Reflected XSS Vulnerability

CVE-2025-62248 Overview

CVE-2025-62248 is a reflected cross-site scripting (XSS) vulnerability in Liferay Portal and Liferay Digital Experience Platform (DXP). The flaw is a regression in the Dynamic Data Mapping (DDM) portlet. An authenticated remote attacker can inject JavaScript through the _com_liferay_dynamic_data_mapping_web_portlet_DDMPortlet_definition request parameter. The injected payload executes in the victim's browser when the victim visits a crafted URL. The weakness is classified under [CWE-79]: Improper Neutralization of Input During Web Page Generation.

Critical Impact
Successful exploitation runs attacker-controlled JavaScript in an authenticated user's session context, enabling session data theft, unauthorized portal actions, and social engineering pivots against Liferay administrators.

Affected Products

Liferay Portal 7.4.0 through 7.4.3.132
Liferay DXP 2024.Q1.1 through 2024.Q4.7, and 2025.Q1.0 through 2025.Q2.9
Liferay DXP 2024.Q2.1 through 2024.Q2.13 and 2024.Q3.1 through 2024.Q3.13

Discovery Timeline

2025-10-22 - CVE-2025-62248 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-62248

Vulnerability Analysis

The vulnerability resides in the Liferay Dynamic Data Mapping web module, specifically in how the DDMPortlet renders the definition parameter back into portlet output. A prior fix regressed, reintroducing an output path that echoes the parameter value without proper HTML or JavaScript context encoding. An authenticated user who can reach the portlet URL can craft a request in which _com_liferay_dynamic_data_mapping_web_portlet_DDMPortlet_definition contains active script content. When a victim loads the crafted URL, the server reflects the payload into the rendered response, and the browser executes it under the origin of the Liferay portal.

Root Cause

The root cause is missing or insufficient output encoding on the definition request parameter within the DDM portlet render path. The regression removed sanitization that was present in earlier releases, restoring an unsafe reflection sink for user-supplied data.

Attack Vector

Exploitation requires an authenticated session and user interaction, because the victim must load an attacker-supplied URL. The attack is network-reachable and does not require elevated portal permissions to send the request, but the payload runs with whatever privileges the victim holds. See the Liferay Security Advisory CVE-2025-62248 for vendor-specific technical detail.

No verified proof-of-concept code has been published for CVE-2025-62248.
Refer to the Liferay security advisory linked above for technical detail.

Detection Methods for CVE-2025-62248

Indicators of Compromise

Requests containing _com_liferay_dynamic_data_mapping_web_portlet_DDMPortlet_definition with values including <script, javascript:, onerror=, onload=, or URL-encoded equivalents such as %3Cscript.
Referer headers from external or unexpected domains pointing at DDM portlet URLs.
Unusual outbound requests from authenticated user sessions immediately after loading a DDM portlet URL, indicating potential session token exfiltration.

Detection Strategies

Deploy a web application firewall (WAF) rule that flags DDM portlet requests where the definition parameter contains HTML tags, event handlers, or script schemes.
Review Liferay access logs for query strings containing the DDMPortlet definition parameter with non-standard values, then correlate against the authenticated user identifier.
Hunt in browser telemetry and endpoint logs for scripts executing under the Liferay portal origin that trigger cross-origin fetch or document.cookie access shortly after portal navigation.

Monitoring Recommendations

Enable verbose HTTP request logging on the Liferay front-end reverse proxy and forward logs to a centralized analytics platform for query.
Alert on authenticated administrator sessions that receive external referrers into DDM portlet endpoints.
Track anomalous portlet parameter length or entropy on definition values, which often indicate obfuscated payloads.

How to Mitigate CVE-2025-62248

Immediate Actions Required

Apply the fixed release identified in the Liferay security advisory to all affected Portal 7.4.x and DXP quarterly release lines.
Restrict access to the Liferay administration interface using network controls, VPN, or IP allow-listing while patching is scheduled.
Invalidate active administrator sessions after patch deployment to eliminate any session tokens exposed by prior exploitation.

Patch Information

Liferay has published remediation guidance in the Liferay Security Advisory CVE-2025-62248. Upgrade Liferay Portal to a release later than 7.4.3.132 and Liferay DXP to the vendor-listed fixed quarterly release for each supported branch.

Workarounds

Deploy a WAF signature that blocks or sanitizes requests where the _com_liferay_dynamic_data_mapping_web_portlet_DDMPortlet_definition parameter contains HTML control characters.
Enforce a strict Content Security Policy (CSP) that disallows inline scripts on Liferay-hosted origins to reduce the impact of reflected payloads.
Enable HTTP-only and SameSite=Strict cookie attributes on Liferay session cookies to limit theft opportunities from injected scripts.

bash

# Example nginx WAF-style block for the vulnerable parameter
if ($arg__com_liferay_dynamic_data_mapping_web_portlet_DDMPortlet_definition ~* "(<script|javascript:|onerror=|onload=|%3Cscript)") {
    return 403;
}