CVE-2025-11887 is a vulnerability classified under CWE-862 (Missing Authorization) found in the Supervisor plugin for WordPress, developed by tiagohillebrandt. The issue exists in all versions up to and including 1.3.2, where several AJAX functions lack proper capability checks. This flaw allows any authenticated user with at least Subscriber-level privileges to invoke these AJAX endpoints and modify various plugin settings without authorization. Since WordPress roles like Subscriber are typically assigned to low-privilege users, this vulnerability significantly lowers the bar for attackers to alter plugin configurations, potentially leading to further exploitation or persistence mechanisms. The vulnerability does not expose confidential data or disrupt service availability but compromises the integrity of plugin settings. The CVSS 3.1 base score is 4.3, reflecting network attack vector, low attack complexity, privileges required, no user interaction, and limited impact on integrity only. No patches or exploit code are currently publicly available, and no active exploitation has been reported. The vulnerability was published on October 24, 2025, and was reserved earlier on October 16, 2025. The affected product is widely used in WordPress environments, which are prevalent globally, making this a relevant concern for many organizations running WordPress sites with the Supervisor plugin installed.

The primary impact of CVE-2025-11887 is unauthorized modification of plugin settings by low-privilege authenticated users. This can lead to integrity violations where attackers alter configurations to weaken security controls, enable backdoors, or manipulate plugin behavior to facilitate further attacks. Although confidentiality and availability are not directly affected, the altered settings could indirectly enable privilege escalation, data exposure, or persistent access if attackers leverage the changed configurations. Organizations relying on the Supervisor plugin for critical site management or security functions may face increased risk of compromise. The vulnerability affects all WordPress sites using the plugin, which is widely deployed across many industries and geographies. Attackers with subscriber-level access, which can be obtained through account creation or credential compromise, can exploit this flaw. This broadens the attack surface and increases the likelihood of exploitation in environments with multiple user accounts or weak authentication controls. The absence of known exploits in the wild currently limits immediate risk, but the vulnerability's nature suggests it could be weaponized once exploit code is developed.

1. Monitor for and apply official patches or updates from the plugin vendor immediately once released to address the missing authorization checks. 2. Until patches are available, restrict user registrations and limit Subscriber-level accounts to trusted users only. 3. Implement strict role-based access control (RBAC) policies to minimize the number of users with authenticated access. 4. Use Web Application Firewalls (WAFs) to monitor and block suspicious AJAX requests targeting the Supervisor plugin endpoints. 5. Audit plugin settings regularly for unauthorized changes and maintain logs of administrative actions. 6. Consider temporarily disabling or uninstalling the Supervisor plugin if it is not essential to reduce attack surface. 7. Educate site administrators and users about the risks of low-privilege account misuse and enforce strong authentication mechanisms such as MFA. 8. Review and harden WordPress security configurations to reduce the impact of compromised low-privilege accounts. 9. Employ intrusion detection systems to alert on anomalous behavior related to plugin configuration changes.