CVE-2025-12158: 
WordPress vulnerability analysis and mitigation

The Simple User Capabilities WordPress plugin (versions <= 1.0) contains a critical vulnerability identified as CVE-2025-12158. The vulnerability was discovered and publicly disclosed on November 3, 2025, with the last update being November 4, 2025. This security issue affects the plugin's authorization mechanisms and has been assigned a CVSS score of 9.8 (Critical) (Wordfence).

The vulnerability is classified as a Missing Authorization issue (CWE-862) that allows authenticated users with subscriber-level access to perform unauthorized privilege escalation. The high CVSS score of 9.8 indicates the critical nature of this security flaw, suggesting it poses a significant risk to affected systems (Wordfence).

The vulnerability enables authenticated users with minimal privileges (Subscriber level and above) to escalate their privileges on affected WordPress installations. This could potentially lead to unauthorized administrative access and complete compromise of the WordPress site (Wordfence).

The WordPress plugin repository has temporarily closed the plugin as of October 30, 2025, pending a full security review. Users are advised to disable and remove the plugin from their WordPress installations until a security fix is available (WordPress).

The plugin has received positive reviews for its user role customization features, with users praising its ease of use and powerful customization options. However, the discovery of this critical vulnerability has led to its temporary closure in the WordPress plugin repository (WordPress).