CVE-2025-67590 identifies a Cross-Site Request Forgery (CSRF) vulnerability in the Rustaurius Ultimate FAQ plugin, versions up to and including 2.4.3. CSRF vulnerabilities occur when an attacker tricks an authenticated user into submitting a forged request to a web application, causing the application to perform unintended actions on behalf of the user. In this case, the Ultimate FAQ plugin lacks sufficient anti-CSRF protections, such as nonce tokens or referer validation, allowing attackers to craft malicious web pages or emails that, when visited by an authenticated user, can execute unauthorized state-changing operations within the plugin. These operations could include modifying FAQ content, changing settings, or other administrative actions depending on the plugin's capabilities and user privileges. The vulnerability does not require user interaction beyond visiting a malicious page but does require the victim to be authenticated to the affected system. No public exploits have been reported yet, and no official patch links are available at the time of publication. The absence of a CVSS score necessitates an independent severity assessment. Given the potential for unauthorized changes and the ease of exploitation, this vulnerability poses a significant risk to the integrity and availability of affected websites using the Ultimate FAQ plugin.

For European organizations, the impact of CVE-2025-67590 can be substantial, particularly for those relying on the Ultimate FAQ plugin to manage critical or customer-facing content. Successful exploitation could lead to unauthorized modification or deletion of FAQ entries, misleading users or disrupting service. This could damage organizational reputation, reduce user trust, and potentially lead to compliance issues if misinformation affects regulatory disclosures or customer support. Additionally, if the plugin is integrated with other systems or workflows, attackers might leverage this vulnerability to pivot to further attacks or data manipulation. The impact is heightened in sectors with stringent data integrity requirements such as finance, healthcare, and government. Since the vulnerability requires authenticated users, organizations with large user bases or weak session management are at increased risk. The lack of known exploits provides a window for proactive mitigation, but also means attackers may develop exploits targeting European entities given their extensive use of WordPress and related plugins.

To mitigate CVE-2025-67590, organizations should first monitor for official patches or updates from Rustaurius and apply them promptly once available. In the interim, administrators should implement web application firewall (WAF) rules to detect and block suspicious CSRF attempts targeting the Ultimate FAQ plugin endpoints. Enforcing strict session management policies, such as short session lifetimes and re-authentication for sensitive actions, can reduce risk. Adding custom anti-CSRF tokens or nonce validation to the plugin's forms and AJAX requests can provide immediate protection if code modification is feasible. Restricting administrative access to trusted IP ranges and using multi-factor authentication (MFA) for users with plugin management privileges further reduces exploitation likelihood. Regularly auditing plugin usage and user permissions helps identify unnecessary privileges that could be exploited. Finally, educating users about the risks of clicking unknown links while authenticated can help mitigate social engineering vectors.