CVE-2025-12667: 
WordPress vulnerability analysis and mitigation

The GitHub Gist Shortcode Plugin for WordPress has been identified with a Stored Cross-Site Scripting vulnerability (CVE-2025-12667), discovered and disclosed on November 10, 2025. The vulnerability affects all versions up to and including 0.2 of the plugin. The plugin was subsequently closed on November 7, 2025, pending a full security review (NVD, WordPress Plugin).

The vulnerability is classified as a Stored Cross-Site Scripting (CWE-79) issue that exists in the 'id' parameter of the 'gist' shortcode. The security flaw stems from insufficient input sanitization and output escaping. The vulnerability has been assigned a CVSS v3.1 Base Score of 6.4 (Medium) with the following vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N (NVD).

The vulnerability allows authenticated attackers with Contributor-level access or higher to inject arbitrary web scripts into pages. These malicious scripts will execute whenever a user accesses the compromised page, potentially leading to unauthorized data access or manipulation of user sessions (NVD).

The plugin has been temporarily closed and is no longer available for download as of November 7, 2025, pending a complete security review. Users are advised to remove the plugin until a patched version becomes available (WordPress Plugin).