Medium 4.4Published Apr 16, 2026

CVE-2026-3995OPEN-BRAIN <= 0.5.0 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'API Key' Setting

Updated under an hour ago (Oct 27, 2026, 9:23 AM ET)

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It affects faridsaniee OPEN-BRAIN. Add what you run to find out whether that includes you.

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Every CVE for faridsaniee OPEN-BRAIN

Exploited in the last 30 days

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.

CVSS: 4.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Wordfence
NVD analysis: Deferred
Record last updated: Apr 16, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

faridsaniee OPEN-BRAIN faridsaniee:open_brain (from the name)	through 0.5.0	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.