CVE-2025-62257 is a medium-severity vulnerability classified under CWE-307, indicating improper restriction of excessive authentication attempts in Liferay Portal and Liferay DXP products. The vulnerability exists in Liferay Portal versions 7.4.0 through 7.4.3.119, as well as multiple quarterly and update releases of Liferay DXP from 2023 and 2024. The flaw allows remote attackers to conduct brute force password enumeration attacks even when account lockout policies are enabled. This suggests that the lockout mechanism either does not trigger correctly or can be circumvented, allowing attackers to repeatedly attempt authentication without being blocked. The vulnerability requires no user interaction and can be exploited over the network, but partial authentication is needed, possibly meaning the attacker must know or guess valid usernames first. The impact is limited to confidentiality compromise of user credentials, with no direct integrity or availability impact noted. No public exploits have been observed, but the vulnerability poses a risk to organizations relying on Liferay Portal for user authentication and access control. The lack of available patches at the time of publication necessitates immediate mitigation efforts.

For European organizations, this vulnerability poses a significant risk to the confidentiality of user credentials within Liferay Portal and DXP environments. Successful exploitation could lead to unauthorized access to sensitive portals, internal resources, or customer data managed via Liferay platforms. Given Liferay's popularity in enterprise content management and digital experience management, especially among public sector, financial, and large corporate entities in Europe, exploitation could facilitate lateral movement, data exfiltration, or fraud. The bypass of account lockout mechanisms increases the likelihood of successful brute force attacks, potentially affecting a large number of user accounts. This could undermine trust in affected services and lead to regulatory compliance issues under GDPR due to compromised personal data. While no integrity or availability impacts are directly associated, the breach of credentials can indirectly lead to further attacks or service disruptions.

European organizations should immediately inventory their Liferay Portal and DXP deployments to identify affected versions. Until official patches are released, implement enhanced monitoring and alerting on authentication attempts to detect brute force patterns. Enforce multi-factor authentication (MFA) to reduce reliance on passwords alone. Consider deploying web application firewalls (WAFs) with rate-limiting rules specific to authentication endpoints to block excessive login attempts. Review and tighten account lockout policies and verify their correct enforcement. Limit exposure of Liferay login interfaces to trusted networks or VPNs where feasible. Conduct user awareness campaigns to encourage strong, unique passwords. Once patches become available from Liferay, prioritize timely application to eliminate the vulnerability. Additionally, perform regular audits of user accounts and access logs to identify suspicious activity promptly.