CVE-2026-77194
Simple Membership <= 4.8.1 - Unauthenticated Authentication Bypass to Administrator Account Takeover via Multisite Identity Binding
- Published
- Updated
- Reserved
- Assigned by
- Wordfence
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| WordfenceCNA (assigner) | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
| NVDNVD · Deferred | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.58% · top 52% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
Affected products
wpinsider-1 · Simple Membership
- affected ≤ 4.8.1
References (8)
- https://www.wordfence.com/threat-intel/vulnerabilities/id/ccd3eae5-3d30-4d0d-8f95-5f0747e4e944?source=cve (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/simple-membership/tags/4.8.0/classes/class.swpm-utils.php#L329 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/simple-membership/tags/4.8.0/classes/class.swpm-utils-member.php#L461 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/simple-membership/tags/4.8.0/classes/class.swpm-utils.php#L365 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/simple-membership/tags/4.8.0/classes/class.swpm-front-registration.php#L126 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/simple-membership/tags/4.8.0/classes/class.swpm-form.php#L214 (opens in a new tab)
- https://plugins.trac.wordpress.org/changeset/3668897/ (opens in a new tab)
- https://plugins.trac.wordpress.org/changeset/3673368/ (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)
- 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://trackcve.app/cve/CVE-2026-77194)Record last updated .