CVE-2025-10476 identifies a missing authorization vulnerability (CWE-862) in the WP Fastest Cache plugin for WordPress, specifically in the wpfc_db_fix_callback() function. This function lacks proper capability checks, allowing any authenticated user with Subscriber-level privileges or above to invoke database fix operations that should be restricted. The vulnerability affects all versions up to and including 1.4.0 and only impacts sites with the premium version of the plugin activated. Exploitation does not require user interaction and can be performed remotely over the network. The flaw allows unauthorized modification of database-related data, potentially leading to integrity issues within the cached data or plugin state. However, it does not expose confidential information or disrupt site availability. The CVSS v3.1 score is 4.3 (medium), reflecting the limited scope and impact, as well as the requirement for authenticated access. No public exploits have been reported yet, but the vulnerability poses a risk to WordPress sites relying on this caching plugin for performance optimization. The lack of a patch at the time of publication necessitates immediate attention from site administrators to implement compensating controls.

For European organizations, this vulnerability could lead to unauthorized modification of cached data or plugin database entries, potentially causing data integrity issues or unexpected behavior in website caching mechanisms. While it does not directly compromise sensitive data confidentiality or cause denial of service, altered cache data could degrade website performance or lead to inconsistent content delivery, impacting user experience and trust. Attackers with low-level authenticated access, such as compromised subscriber accounts, could exploit this flaw to escalate their influence on the site’s operation. Organizations relying on WP Fastest Cache premium for high-traffic or business-critical WordPress sites may face reputational damage or operational disruptions if attackers manipulate cached content or database states. The risk is heightened in environments where subscriber accounts are easily obtainable or where internal users have limited security awareness. Given the widespread use of WordPress in Europe, especially among SMEs and content-heavy sites, the vulnerability could have a broad impact if left unmitigated.

1. Immediately restrict access to the WP Fastest Cache plugin settings and database fix functionalities to trusted administrators only, using role-based access controls or security plugins that enforce stricter capability checks. 2. Monitor WordPress logs and plugin activity for unusual or unauthorized database fix actions, especially from subscriber or low-privilege accounts. 3. Disable or deactivate the premium features of WP Fastest Cache if not essential, until an official patch is released. 4. Implement multi-factor authentication (MFA) for all WordPress user accounts to reduce the risk of account compromise. 5. Regularly audit user roles and permissions to ensure no unnecessary elevation of privileges exists. 6. Keep WordPress core, themes, and plugins updated, and apply the official patch from the vendor as soon as it becomes available. 7. Consider deploying a Web Application Firewall (WAF) with custom rules to detect and block suspicious requests targeting the vulnerable function. 8. Educate site administrators and users about the risks of low-privilege account misuse and encourage strong password policies.