Themify Builder <= 7.8.0 - Missing Authorization to Unauthenticated Arbitrary Builder Data Modification via 'tb_update_old_data' AJAX Action

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-75027
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-22 04:18:15 UTC
Updated2026-08-22 04:18:15 UTC
DescriptionThe Themify Builder plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 7.8.0. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to modify the stored Themify Builder styling data (padding and margin properties) of arbitrary posts, including private and draft posts, by supplying an attacker-controlled post ID and JSON styling payload. The nonce required by the handler is automatically emitted to all frontend pages rendered by the builder via wp_localize_script, meaning any unauthenticated visitor can trivially retrieve a valid nonce from page source and satisfy the only access control in place.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Problem Types: CWE-862 | CWE-862 CWE-862 Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Themifyme Themify Builder affected 7.8.0 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/themify-builder/tags/7.7.6/classes/class-themify-buil... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/themify-builder/tags/7.8.0/classes/class-themify-buil... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/themify-builder/tags/7.8.0/classes/class-themify-buil... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/themify-builder/tags/7.7.6/classes/class-themify-buil... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/themify-builder/tags/7.7.6/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/7.8.0/classes/class-themify-buil... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/themify-builder/tags/7.7.6/classes/class-themify-buil... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/themify-builder/tags/7.8.0/classes/class-themify-buil... [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/b1892207-0e51-4b2e-bc71-d6a01... [email protected] www.wordfence.com
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: Wordfence PRISM (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-08-17T15:09:32.000ZVendor Notified
CNA2026-08-21T15:10:25.000ZDisclosed

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