{"cve":"CVE-2026-77194","nvd":{"published":"2026-09-01T12:17:47.737","modified":"2026-09-01T20:47:54.130","status":"Deferred","description":"The Simple Membership plugin for WordPress is vulnerable to Authentication Bypass leading to Administrator Account Takeover in versions up to, and including, 4.8.0. This is due to improper identity verification during the public registration flow in WordPress Multisite environments, where the plugin binds new Simple Membership records to existing global WordPress users based solely on matching username and email, without requiring password verification or ownership proof, and fails to properly detect Administrator roles on child sites. This makes it possible for unauthenticated attackers to take over Administrator accounts on child sites in a Multisite network by registering a Simple Membership account with a victim's credentials on a site where public registration is enabled, then updating the victim's global WordPress password through the profile edit functionality. The vulnerability was partially patched in version 4.8.1.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","score":5.3},"cwes":["CWE-287"],"references":["https://plugins.trac.wordpress.org/browser/simple-membership/tags/4.8.0/classes/class.swpm-form.php#L214","https://plugins.trac.wordpress.org/browser/simple-membership/tags/4.8.0/classes/class.swpm-front-registration.php#L126","https://plugins.trac.wordpress.org/browser/simple-membership/tags/4.8.0/classes/class.swpm-utils-member.php#L461","https://plugins.trac.wordpress.org/browser/simple-membership/tags/4.8.0/classes/class.swpm-utils.php#L329","https://plugins.trac.wordpress.org/browser/simple-membership/tags/4.8.0/classes/class.swpm-utils.php#L365"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:50:50.842544443+00:00"},"epss":{"cve":"CVE-2026-77194","score":0.00583,"percentile":0.47891,"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."]}