CVE-2025-6105 is a Cross-Site Request Forgery (CSRF) vulnerability identified in version 5.0.1 of the jflyfox jfinal_cms content management system. The vulnerability resides in the handling of the 'Logout' argument within the HOME.java file. Specifically, the application does not adequately verify the authenticity of requests that trigger the logout functionality, allowing an attacker to craft malicious requests that, when executed by an authenticated user, can cause unintended actions without their consent. The vulnerability can be exploited remotely without requiring any authentication or elevated privileges, and only requires user interaction in the form of the victim visiting a maliciously crafted web page or clicking a link. The CVSS 4.0 base score is 5.3 (medium severity), reflecting the fact that while the attack vector is network-based and requires no privileges, the impact on confidentiality and availability is limited, with integrity impact being low. The vendor has been contacted but has not responded or issued a patch, and no known exploits have been observed in the wild yet. Given the public disclosure and availability of exploit details, the risk of exploitation may increase over time. CSRF vulnerabilities typically enable attackers to perform unauthorized state-changing actions on behalf of authenticated users, potentially leading to session termination or disruption of user workflows in this context.

For European organizations using jflyfox jfinal_cms 5.0.1, this vulnerability could lead to unauthorized logout actions initiated by attackers, disrupting user sessions and potentially causing denial of service to legitimate users. While the direct confidentiality and data integrity impacts are limited, the forced logout could be leveraged as part of a broader attack chain, such as session fixation or social engineering campaigns. Organizations relying on jfinal_cms for critical web content management may experience service interruptions or user dissatisfaction. Additionally, if the CMS is integrated with other internal systems or workflows, repeated forced logouts could degrade operational efficiency. The lack of vendor response and patch availability increases the window of exposure. European entities with public-facing web portals using this CMS are particularly at risk, as attackers can exploit the vulnerability remotely without authentication. The impact is more operational than data breach-related but can still affect business continuity and user trust.

Given the absence of an official patch, European organizations should implement immediate compensating controls. First, enforce strict anti-CSRF tokens on all state-changing requests, including logout actions, to ensure requests originate from legitimate user sessions. If modifying the CMS code is feasible, developers should add CSRF token validation in the HOME.java logout handler. Second, implement Content Security Policy (CSP) headers to restrict the domains from which scripts and forms can be loaded, reducing the risk of malicious request injection. Third, consider deploying Web Application Firewalls (WAFs) with custom rules to detect and block suspicious CSRF patterns targeting the logout endpoint. Fourth, educate users about the risks of clicking unknown links and visiting untrusted websites while authenticated. Finally, monitor web server logs for unusual logout request patterns that may indicate exploitation attempts. Organizations should also evaluate upgrading to a later, patched version of jfinal_cms once available or consider alternative CMS platforms with active security support.