CVE-2026-3995
MEDIUM SEVERITYCVSS Score & Metrics
Base Score
4.4 / 10
Vector String
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
Vulnerability 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.
Vulnerability Details
Published Date
Last Modified
CWE ID
CWE-79
Source
NVD
External References
- https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L128
- https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L252
- https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L253
- https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L272
- https://plugins.trac.wordpress.org/browser/open-brain/trunk/index.php#L128
- https://plugins.trac.wordpress.org/browser/open-brain/trunk/index.php#L252
- https://plugins.trac.wordpress.org/browser/open-brain/trunk/index.php#L253
- https://plugins.trac.wordpress.org/browser/open-brain/trunk/index.php#L272
- https://www.wordfence.com/threat-intel/vulnerabilities/id/3fe3fa95-cc1d-469b-8a97-37987b9ae362?source=cve
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