CSRF in Faridsaniee Open-Brain
CVE-2026-4091
The OPEN-BRAIN plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 0.5.0. This is due to missing nonce verification on the settings form in the func_page_main() function. This makes it possible for unauthenticated attackers to inject malicious web scripts via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
Vulnerability class: CSRF (Cross-Site Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (10.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 10.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Faridsaniee Open-Brain — versions 0
Weakness classification (CWE)
References
- www.wordfence.com/threat-intel/vulnerabilities/id/93df6480-9bb1-4f5d-bb39-ff1a0…
- plugins.trac.wordpress.org/browser/open-brain/trunk/index.php
- plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php
- plugins.trac.wordpress.org/browser/open-brain/trunk/index.php
- plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php
- plugins.trac.wordpress.org/browser/open-brain/trunk/index.php
- plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php
- plugins.trac.wordpress.org/browser/open-brain/trunk/index.php
- plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php
Frequently asked questions
- What is CVE-2026-4091?
- CVE-2026-4091 is a medium-severity vulnerability in Faridsaniee Open-Brain, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.1/10. Published 2026-04-15.
- How severe is CVE-2026-4091?
- Medium severity. CVSS v3 base score is 6.1 out of 10.