CVE-2025-10311 is a Cross-Site Request Forgery (CSRF) vulnerability affecting the Comment Info Detector plugin for WordPress, developed by tom_riddle. This vulnerability exists in all versions up to and including 1.0.5. The root cause is the absence of nonce validation on the options.php file during form submissions, which is a critical security control to ensure that requests originate from legitimate users and not from malicious third-party sites. Because of this missing validation, an unauthenticated attacker can craft a malicious request that, if an authenticated site administrator is tricked into clicking (for example, via a link in an email or on a malicious website), can modify the plugin’s settings without the administrator’s consent. The vulnerability does not allow direct compromise of confidentiality or availability but can lead to integrity issues by altering plugin configurations, potentially weakening site security or enabling further attacks. The CVSS 3.1 base score is 4.3 (medium severity), reflecting that the attack vector is network-based, requires no privileges, but does require user interaction (clicking a link). No known exploits are currently in the wild, and no patches have been published yet. This vulnerability highlights the importance of nonce validation in WordPress plugins to prevent CSRF attacks, which can be leveraged to manipulate site behavior indirectly through trusted users.

For European organizations using WordPress sites with the vulnerable Comment Info Detector plugin, this vulnerability poses a moderate risk. While it does not directly expose sensitive data or cause denial of service, unauthorized modification of plugin settings can degrade the security posture of the website. Attackers could potentially alter configurations to disable security features, enable malicious logging, or create conditions favorable for further exploitation. This could lead to reputational damage, especially for organizations relying on their websites for customer engagement or e-commerce. Additionally, regulatory frameworks such as GDPR emphasize the protection of integrity and security of personal data processing systems; a compromised website configuration could indirectly lead to non-compliance if it results in data breaches or unauthorized data manipulation. The requirement for user interaction (administrator clicking a malicious link) somewhat limits the exploitability but does not eliminate risk, especially in environments where phishing attacks are prevalent. Organizations with multiple WordPress administrators or less security-aware staff are at higher risk.

1. Immediate mitigation should include educating WordPress administrators about the risk of clicking untrusted links and implementing strict email and web filtering to reduce phishing attempts. 2. Administrators should monitor plugin settings for unauthorized changes and maintain regular backups of site configurations to enable quick restoration. 3. Developers and site maintainers should implement nonce validation on all form submissions, particularly in options.php, to ensure requests are legitimate. 4. Until an official patch is released, consider disabling or removing the Comment Info Detector plugin if it is not essential, or restrict administrative access to trusted networks and users only. 5. Employ Content Security Policy (CSP) and SameSite cookie attributes to reduce the risk of CSRF attacks. 6. Regularly update WordPress core and plugins to their latest versions and subscribe to vulnerability advisories for timely patching. 7. Use web application firewalls (WAFs) that can detect and block suspicious CSRF attempts targeting known vulnerable endpoints.