CVE-2026-57369

Themify Builder plugin in versions up to and including 7.8.1 contains a PHP Object Injection vulnerability. A contributor-level user can inject a malicious PHP object, potentially leading to further exploitation.

The Themify Builder plugin for WordPress (up to and including 7.8.1) is vulnerable to Stored Cross-Site Scripting (XSS) via the 'css[fonts]' parameter due to insufficient input sanitization and output escaping. This allows unauthenticated attackers to inject arbitrary web scripts into pages that execute when a user visits the injected page. The nonce required to reach the vulnerable endpoint is embedded in plain sight within the front-end page markup for all visitors, reducing access control to a CSRF token rather than an authentication barrier and making the endpoint fully exploitable by unauthenticated attackers.

The Themify Builder plugin for WordPress up to version 7.8.0 is vulnerable to authorization bypass due to improper verification of user permissions. Unauthenticated attackers can modify the stored styling data (padding and margin properties) of arbitrary posts, including private and draft posts, by supplying a post ID and JSON payload.

The Themify Builder plugin for WordPress up to version 7.7.7 contains an authorization bypass vulnerability. Authenticated attackers with subscriber-level access or higher can overwrite or delete generated CSS stylesheets of arbitrary posts, including private and draft posts of other users, and modify plugin-scoped font options. The CSRF nonce (tf_nonce) is exposed on public front-end pages, making it easily obtainable.

The Themify Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'height_slider' Slider Module Field in all versions up to and including 7.7.6 due to insufficient input sanitization and output escaping.

The Themify Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'b_width_map' field in the Map Module in all versions up to and including 7.7.6 due to insufficient input sanitization and output escaping.

The Themify Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting (XSS) via several parameters in all versions up to, and including, 7.6.9 due to insufficient input sanitization and output escaping. An authenticated attacker with Contributor-level access or higher can inject arbitrary scripts into pages that execute whenever a user visits the injected page. The vulnerability was partially patched in version 7.6.9.