CVE-2025-59110 identifies a Cross-Site Request Forgery (CSRF) vulnerability in Windu CMS version 4.1, specifically within its user editing functionality. CSRF attacks trick authenticated users into submitting unwanted requests to a web application, potentially causing unauthorized actions. Windu CMS implements a CSRF protection mechanism using tokens; however, this vulnerability allows an attacker to bypass this protection by reusing a CSRF token from another user. Since Windu CMS has open registration, any attacker can create an account and leverage this flaw to perform unauthorized user edits on other accounts. The vulnerability does not require prior authentication but does require user interaction (e.g., clicking a malicious link). The flaw compromises the integrity of user data by allowing unauthorized modifications but does not affect confidentiality or availability directly. The issue was confirmed in version 4.1 and resolved in build 2250 of the same version. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges required, user interaction needed, and high impact on integrity. No known exploits are currently reported in the wild, but the vulnerability poses a moderate risk due to the ease of exploitation and potential for unauthorized user data manipulation.

For European organizations using Windu CMS 4.1, this vulnerability could lead to unauthorized changes to user accounts, potentially allowing attackers to escalate privileges, alter user data, or disrupt normal user management workflows. This undermines the integrity of the CMS user base and could facilitate further attacks such as privilege escalation or social engineering. Organizations relying on Windu CMS for public-facing websites or internal portals may face reputational damage and operational disruption if exploited. The open registration feature increases the attack surface, as attackers can freely create accounts to exploit the vulnerability. While confidentiality and availability impacts are limited, the integrity compromise can have cascading effects on trust and security posture. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially given the medium CVSS score and ease of exploitation.

European organizations should immediately upgrade Windu CMS installations to version 4.1 build 2250 or later, where the vulnerability is patched. Until the upgrade is applied, administrators should consider temporarily disabling open registration or restricting user editing capabilities to trusted roles only. Implement additional server-side validation to verify user actions beyond relying solely on CSRF tokens. Monitor user account activities for unusual modifications and implement anomaly detection to identify potential exploitation attempts. Educate users about phishing and social engineering risks to reduce the likelihood of successful CSRF attacks requiring user interaction. Review session management policies to ensure tokens are unique per user and cannot be reused across sessions. Conduct regular security audits and penetration testing focused on CSRF and related web vulnerabilities to proactively identify weaknesses.