CVE-2025-62249 is a reflected cross-site scripting (XSS) vulnerability classified under CWE-79, found in Liferay Portal versions 7.4.0 through 7.4.3.132 and multiple Liferay DXP quarterly releases from 2023.Q4 to 2025.Q3. The flaw arises from improper neutralization of user-supplied input in the google_gadget parameter during web page generation, allowing an attacker to inject arbitrary JavaScript code. This vulnerability does not require authentication, user interaction, or privileges, making it remotely exploitable over the network. When exploited, the malicious script executes in the context of the victim's browser, potentially enabling session hijacking, credential theft, or unauthorized actions on behalf of the user. The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N) reflects a network attack vector with low attack complexity and no required privileges or user interaction, but with limited impact on confidentiality and integrity, and low impact on availability. No patches or exploits are currently publicly available, but the vulnerability is published and should be addressed promptly. Liferay Portal is widely used for enterprise web portals, intranet sites, and content management, making this vulnerability relevant for organizations relying on these platforms.

For European organizations, this vulnerability poses a risk primarily to confidentiality and integrity of user sessions and data accessed via Liferay Portal. Successful exploitation could lead to unauthorized access to sensitive information, session hijacking, and potential lateral movement within corporate networks if portal credentials are compromised. Given that Liferay Portal is often used for internal and external-facing web portals, including employee intranets and customer-facing sites, the impact could extend to both internal users and external clients. The reflected XSS nature means attackers could craft malicious URLs to trick users into executing harmful scripts, increasing the risk of phishing and social engineering attacks. Although the CVSS score is medium, the ease of exploitation without authentication or user interaction elevates the threat level for organizations with high-value data or critical business processes hosted on Liferay. Disruption of portal services or reputational damage due to client data exposure are additional concerns. The absence of known exploits in the wild currently reduces immediate risk but does not eliminate the potential for future attacks.

European organizations should immediately assess their Liferay Portal deployments to identify affected versions. Since no official patches are listed yet, temporary mitigations include implementing strict input validation and output encoding on the google_gadget parameter to neutralize malicious scripts. Web Application Firewalls (WAFs) should be configured to detect and block suspicious payloads targeting this parameter. Organizations should also enforce Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. Monitoring web server logs for unusual requests containing suspicious script patterns can help detect attempted exploitation. User awareness training to recognize phishing attempts involving malicious URLs referencing Liferay portals is recommended. Once vendor patches become available, prompt application is critical. Additionally, restricting access to the portal to trusted networks or via VPN can reduce exposure. Regular security assessments and penetration testing focusing on web application vulnerabilities will help identify residual risks.