CVE-2026-4091 json
OPEN-BRAIN <= 0.5.0 - Cross-Site Request Forgery
published 6mo ago modified 4mo ago also EUVD-2026-22870
- cvss
- 6.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 11%
- public exploits
- 0
- none known
Summary
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.
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 6mo ago
Exploit prediction
0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected products
- faridsaniee OPEN-BRAIN
Classification
- Weakness
-
- CWE-352 Cross-Site Request Forgery
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/93df6480-9bb1-4f5d-bb39-ff1a01d739cf?source=cve
- plugins.trac.wordpress.org /browser/open-brain/trunk/index.php#L272
- plugins.trac.wordpress.org /browser/open-brain/tags/0.5.0/index.php#L272
- plugins.trac.wordpress.org /browser/open-brain/trunk/index.php#L252
- plugins.trac.wordpress.org /browser/open-brain/tags/0.5.0/index.php#L252
- plugins.trac.wordpress.org /browser/open-brain/trunk/index.php#L253
- plugins.trac.wordpress.org /browser/open-brain/tags/0.5.0/index.php#L253
- plugins.trac.wordpress.org /browser/open-brain/trunk/index.php#L237
- plugins.trac.wordpress.org /browser/open-brain/tags/0.5.0/index.php#L237
Sources
- CVE List CVE-2026-4091
- NVD CVE-2026-4091
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.