- 6.1MediumCVSS base score
- 0.21%Exploitation in 30 daysEPSS · top 88% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Wordfence
- 34 days later
· 34 days later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| WordfenceCNA (assigner) | 3.1 | Medium6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVDNVD · Deferred | 3.1 | Medium6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.21% · top 88% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.1.
Affected products
- affected ≤ 0.5.0
References
References9
- https://www.wordfence.com/threat-intel/vulnerabilities/id/93df6480-9bb1-4f5d-bb39-ff1a01d739cf?source=cve (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/open-brain/trunk/index.php#L272 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L272 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/open-brain/trunk/index.php#L252 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L252 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/open-brain/trunk/index.php#L253 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L253 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/open-brain/trunk/index.php#L237 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L237 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-22870 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-4091)Record last updated .