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Vulnerabilities CVE-2026-15407

CVE-2026-15407

Medium
Open
TLP:CLEAR

Themify Builder <= 7.7.7 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Post Stylesheet Write/Delete via tb_generate_on_fly AJAX Action

NVD CVE.org
Critical Infrastructure

AI Analysis

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Description

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.

Details

CVSS Score
4.3
EPSS Score
0.29%

21.3th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Confidence
90%
Published
Jul 16, 2026
Last Modified
Jul 18, 2026
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