CVE-2025-62266 is an open redirect vulnerability categorized under CWE-601 that affects Liferay Portal versions 7.4.0 through 7.4.3.119 and multiple versions of Liferay DXP from 2023.Q3.1 through 2024.Q1.5, including older unsupported versions. The vulnerability arises because the default security mechanism for redirect URLs relies on IP address validation rather than domain name validation. This design flaw allows attackers to exploit DNS rebinding techniques to redirect users to arbitrary external URLs, potentially leading to phishing attacks, session hijacking, or malware distribution. The vulnerability does not require any authentication or privileges and can be triggered remotely by enticing users to click on crafted URLs, thus requiring user interaction. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges required, user interaction needed, and low impact on confidentiality and integrity, with no impact on availability. No known exploits have been reported in the wild, and no official patches have been linked at the time of publication. Mitigation is possible by changing the redirect URL security configuration from IP-based validation to domain-based validation, which prevents attackers from abusing DNS rebinding to bypass redirect restrictions. This vulnerability primarily affects web portals and digital experience platforms built on Liferay, which are widely used in enterprise and government sectors for content management and collaboration.

For European organizations, this vulnerability poses a moderate risk primarily through social engineering and phishing campaigns that leverage malicious redirects to external sites. Successful exploitation can lead to credential theft, session hijacking, or delivery of malware payloads, impacting confidentiality and integrity of user data. While availability impact is minimal, the reputational damage and potential regulatory consequences under GDPR for failing to protect user data could be significant. Organizations relying on Liferay Portal or DXP for critical web services, especially in sectors like finance, government, healthcare, and education, may face targeted attacks exploiting this vulnerability. The ease of exploitation—requiring no authentication but user interaction—means attackers can craft convincing phishing emails or malicious links to exploit the flaw. Without proper mitigation, attackers could also use this vulnerability as a stepping stone for more complex attacks involving lateral movement or data exfiltration.

European organizations should immediately review and update their Liferay Portal and DXP configurations to enforce domain-based validation for redirect URLs instead of IP-based validation. This change mitigates the DNS rebinding attack vector exploited by CVE-2025-62266. Additionally, organizations should: 1) Monitor web server and application logs for unusual redirect patterns or spikes in external redirects. 2) Implement web application firewalls (WAFs) with rules to detect and block suspicious redirect attempts. 3) Educate users about the risks of clicking on unsolicited links and encourage verification of URLs before interaction. 4) Keep Liferay software up to date and subscribe to vendor advisories for forthcoming patches. 5) Conduct regular security assessments and penetration tests focusing on redirect and input validation vulnerabilities. 6) Employ Content Security Policy (CSP) headers to restrict the domains to which users can be redirected. These steps collectively reduce the risk of exploitation and limit the impact of any successful attacks.