{"cve":"CVE-2026-4091","nvd":{"published":"2026-04-15T09:16:33.050","modified":"2026-06-17T10:55:58.700","status":"Deferred","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-352"],"references":["https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L237","https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L252","https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L253","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#L237"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:30:49.762551342+00:00"},"epss":{"cve":"CVE-2026-4091","score":0.00211,"percentile":0.11427,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}