CVE-2026-95864
Received Received - Intake

Stored XSS in Themify Builder WordPress Plugin

Publication date: 2026-09-25

Last updated on: 2026-09-25

Assigner: Wordfence

Description
The Themify Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'css[fonts]' Parameter in all versions up to, and including, 7.8.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an 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 the access control to a CSRF token rather than an authentication barrier and making the endpoint fully exploitable by unauthenticated attackers.

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Meta Information

Published
2026-09-25
Last Modified
2026-09-25
Generated
2026-09-25
AI Q&A
2026-09-25
EPSS Evaluated
N/A
NVD
CVE-2026-95864
EUVD
EUVD-2026-86580

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
themify builder to 7.8.1 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

The Themify Builder plugin for WordPress has a stored Cross-Site Scripting (XSS) vulnerability in versions up to 7.8.1. The issue occurs due to insufficient input sanitization and output escaping in the 'css[fonts]' parameter. Attackers can inject malicious scripts into pages, which execute when users access those pages. The vulnerability is exploitable by unauthenticated attackers because the required nonce is exposed in the front-end markup, reducing access control to a CSRF token rather than requiring authentication.

Detection Guidance

To detect this vulnerability, inspect WordPress sites using Themify Builder versions up to 7.8.1 for unsanitized input in the 'css[fonts]' parameter. Check for injected scripts in page markup or database entries. Use security plugins like Wordfence to scan for known indicators of compromise.

Impact Analysis

This vulnerability allows attackers to inject arbitrary web scripts into pages. If exploited, it could lead to unauthorized actions on behalf of users, theft of sensitive data like cookies or session tokens, or defacement of websites. Users visiting an infected page may have their interactions monitored or their browsers redirected to malicious sites without their knowledge.

Compliance Impact

This vulnerability could lead to data breaches, exposing user data and violating privacy regulations like GDPR and HIPAA. GDPR requires protection of personal data, and a breach could result in fines or legal consequences. HIPAA mandates safeguards for protected health information, and exploitation of this flaw could lead to unauthorized access, triggering compliance violations and penalties.

Mitigation Strategies

Update the Themify Builder plugin to the latest version beyond 7.8.1 to patch the vulnerability. If an update is not available, consider disabling the plugin temporarily until a fix is released.

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