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.
Published: 2026-04-16
Score: 4.4 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Stored Cross‑Site Scripting
Action: Patch Immediately
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Thu, 16 Apr 2026 12:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 16 Apr 2026 09:30:00 +0000

Type Values Removed Values Added
First Time appeared Faridsaniee
Faridsaniee open-brain
Wordpress
Wordpress wordpress
Vendors & Products Faridsaniee
Faridsaniee open-brain
Wordpress
Wordpress wordpress

Thu, 16 Apr 2026 07:15:00 +0000

Type Values Removed Values Added
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.
Title OPEN-BRAIN <= 0.5.0 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'API Key' Setting
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 4.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N'}


Subscriptions

Faridsaniee Open-brain
Wordpress Wordpress
cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published:

Updated: 2026-04-16T12:04:24.073Z

Reserved: 2026-03-11T17:04:22.771Z

Link: CVE-2026-3995

cve-icon Vulnrichment

Updated: 2026-04-16T11:12:03.420Z

cve-icon NVD

Status : Deferred

Published: 2026-04-16T07:16:30.503

Modified: 2026-04-22T20:22:50.570

Link: CVE-2026-3995

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-17T06:00:09Z

Weaknesses