Themify Builder <= 7.7.7 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Post Stylesheet Write/Delete via tb_generate_on_fly AJAX Action
Summary
| CVE | CVE-2026-15407 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-07-16 09:16:18 UTC |
| Updated | 2026-07-16 13:38:53 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 4.3 MEDIUM from [email protected]
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
EPSS: 0.002880000 probability, percentile 0.207190000 (date 2026-07-16)
Problem Types: CWE-862 | CWE-862 CWE-862 Missing Authorization
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 4.3 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| 3.1 | CNA | DECLARED | 4.3 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
LowAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Themifyme | Themify Builder | affected 7.7.7 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| plugins.trac.wordpress.org/browser/themify-builder/tags/7.7.7/classes/class-themify-buil... | [email protected] | plugins.trac.wordpress.org | |
| www.wordfence.com/threat-intel/vulnerabilities/id/b59e2773-31f0-4c19-b066-30982... | [email protected] | www.wordfence.com | |
| plugins.trac.wordpress.org/browser/themify-builder/tags/7.7.7/classes/class-themify-buil... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/themify-builder/tags/7.7.7/classes/class-themify-buil... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/themify-builder/tags/7.7.7/classes/class-themify-buil... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/themify-builder/tags/7.7.5/classes/class-themify-buil... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/themify-builder/tags/7.7.5/classes/class-themify-buil... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/changeset | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/themify-builder/tags/7.7.5/classes/class-themify-buil... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/themify-builder/tags/7.7.5/classes/class-themify-buil... | [email protected] | plugins.trac.wordpress.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: PRISM (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-07-10T14:09:39.000Z | Vendor Notified |
| CNA | 2026-07-15T00:00:00.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.