CVE-2026-15407
MediumCVSS 4.3Exploitation Probability (EPSS)
Low risk21th percentile - higher than 21% of all known CVEs
Summary
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.
Risk Assessment
The organization faces unauthorized modifications to page appearance and functionality, potentially leading to defacement, data leakage from private posts, or site disruption.
Recommendation
Immediately update the Themify Builder plugin to the latest available version that fixes this vulnerability. Additionally, restrict user privileges to the minimum necessary for their roles.
Other vulnerabilities in Themify Builder
See all- CVE-2026-75027Medium
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.
- CVE-2026-57369High
The Themify Builder plugin for WordPress contains a reflected XSS (Cross-site Scripting) vulnerability due to improper input neutralization during page generation. The issue affects versions up to and including 7.7.4.
- CVE-2026-15097Medium
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.
- CVE-2026-15096Medium
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.
Original NVD description (English source)
The Themify Builder plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 7.7.7. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to overwrite or delete the generated CSS stylesheet file of arbitrary posts, including private and draft posts owned by other users, and modify plugin-scoped font options. The required CSRF nonce (tf_nonce) is emitted on public front-end builder pages via wp_localize_script, making it trivially obtainable by any authenticated user visiting such a page.