CVE-2025-62246 is a stored cross-site scripting (XSS) vulnerability classified under CWE-79, found in Liferay Portal versions 7.4.0 through 7.4.3.111 and several Liferay DXP versions including 2023.Q4.0 through 2023.Q4.5 and 2023.Q3.1 through 2023.Q3.8, as well as 7.4 GA through update 92. The vulnerability arises from improper neutralization of input during web page generation, specifically when user-supplied data in the first, middle, or last name fields is injected into various widgets that support comments and mentions, such as page comments, blog entry comments, document comments, message board messages, and wiki page comments. Remote authenticated users can craft payloads that embed malicious JavaScript or HTML, which is then stored and executed in the context of other users viewing the affected widgets. This can lead to session hijacking, unauthorized actions, or data exfiltration. The attack vector requires the attacker to have authenticated access and some level of user interaction to trigger the payload. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges required beyond authentication, user interaction required, and low impact on confidentiality, integrity, and availability. No public exploits have been reported yet, but the vulnerability is publicly disclosed and should be addressed promptly. The lack of available patches at the time of disclosure necessitates interim mitigations such as input validation and output encoding.

For European organizations, this vulnerability poses a moderate risk primarily in environments where Liferay Portal or DXP is used for internal or external collaboration, content management, or customer engagement. Exploitation could allow attackers to execute arbitrary scripts in the context of other users, potentially leading to theft of session tokens, user credentials, or unauthorized actions such as data modification or privilege escalation within the portal. This can compromise confidentiality and integrity of sensitive information and disrupt availability if malicious scripts perform denial-of-service actions. The requirement for authenticated access limits the attack surface but does not eliminate risk, especially in large organizations with many users or weak access controls. Sectors such as government, finance, healthcare, and large enterprises in Europe that rely on Liferay for critical web portals are particularly vulnerable. The vulnerability could also facilitate lateral movement or serve as a foothold for further attacks within the network.

1. Apply official patches from Liferay as soon as they become available to address CVE-2025-62246 directly. 2. In the absence of patches, implement strict input validation on user name fields to reject or sanitize potentially malicious characters or scripts. 3. Employ robust output encoding/escaping mechanisms on all user-generated content displayed in widgets supporting comments and mentions to prevent script execution. 4. Restrict the ability to edit user profile fields to trusted users only and monitor changes for suspicious activity. 5. Enable Content Security Policy (CSP) headers to limit the execution of unauthorized scripts within the portal. 6. Conduct regular security awareness training for users to recognize and report suspicious content or phishing attempts that may leverage XSS. 7. Monitor logs and user activity for unusual behavior indicative of exploitation attempts. 8. Consider deploying Web Application Firewalls (WAF) with rules tailored to detect and block XSS payloads targeting Liferay components. 9. Review and minimize the number of users with elevated privileges to reduce potential impact. 10. Test all mitigations in a staging environment before deployment to avoid service disruption.