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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-3995 Detail

Description

The OPEN-BRAIN plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'API Key' settings field in all versions up to, and including, 0.5.0. This is due to insufficient input sanitization and output escaping. The plugin uses sanitize_text_field() which strips HTML tags but does not encode double quotes or other HTML-special characters needed for safe attribute context output. The API key value is saved via update_option() and later output into an HTML input element's value attribute without esc_attr() escaping. This makes it possible for authenticated attackers, with Administrator-level access, to inject arbitrary web scripts via attribute breakout payloads (e.g., double quotes followed by event handlers) that execute whenever a user accesses the plugin settings page.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L128 Wordfence
https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L252 Wordfence
https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L253 Wordfence
https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L272 Wordfence
https://plugins.trac.wordpress.org/browser/open-brain/trunk/index.php#L128 Wordfence
https://plugins.trac.wordpress.org/browser/open-brain/trunk/index.php#L252 Wordfence
https://plugins.trac.wordpress.org/browser/open-brain/trunk/index.php#L253 Wordfence
https://plugins.trac.wordpress.org/browser/open-brain/trunk/index.php#L272 Wordfence
https://www.wordfence.com/threat-intel/vulnerabilities/id/3fe3fa95-cc1d-469b-8a97-37987b9ae362?source=cve Wordfence

Weakness Enumeration

CWE-ID CWE Name Source
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Wordfence  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-3995
NVD Published Date:
04/16/2026
NVD Last Modified:
04/16/2026
Source:
Wordfence