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CVE-2026-77194: CWE-287 Improper Authentication in wpinsider-1 Simple Membership

0
Medium
VulnerabilityCVE-2026-77194cvecve-2026-77194cwe-287
Published: 09/01/2026 (09/01/2026, 11:31:08 UTC)
Source: CVE Database V5
Vendor/Project: wpinsider-1
Product: Simple Membership

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 v3.1

Score 5.3medium

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Technical Details

Data Version
5.2
Assigner Short Name
Wordfence
Date Reserved
2026-08-20T17:07:00.177Z
Cvss Version
3.1
State
PUBLISHED
Remediation Level
null

Threat ID: 6a96b915acd9273b49a380cf

Added to database: 09/01/2026, 11:37:57 UTC

Last updated: 09/01/2026, 12:52:24 UTC

Views: 5

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