CVE-2026-15930

Simple Membership < 4.7.8 - Unauthenticated Administrator Account Takeover via Registration Username Collision

Published Aug 3, 2026 CVSS 3.1 · 9.4 Critical EPSS < 1% KEV · Not listed
Description
The Simple Membership WordPress plugin before 4.7.8 does not verify whether user creation failed during registration before using the returned value as a user ID to update an account, allowing unauthenticated attackers to overwrite the primary administrator's account data (including the email address) and take over that account through the password reset flow.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Weaknesses CWE-285
Type Values Removed Values Added
Weaknesses CWE-862
Metrics cvssV3_1

{'score': 9.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Simple-membership-plugin
Simple-membership-plugin simple Membership
Wordpress
Wordpress wordpress
Vendors & Products Simple-membership-plugin
Simple-membership-plugin simple Membership
Wordpress
Wordpress wordpress
Type Values Removed Values Added
Weaknesses CWE-285
Type Values Removed Values Added
Description The Simple Membership WordPress plugin before 4.7.8 does not verify whether user creation failed during registration before using the returned value as a user ID to update an account, allowing unauthenticated attackers to overwrite the primary administrator's account data (including the email address) and take over that account through the password reset flow.
Title Simple Membership < 4.7.8 - Unauthenticated Administrator Account Takeover via Registration Username Collision
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
WPScan
Published
Updated
Aug 3, 2026, 5:30 PM
Reserved
Jul 16, 2026, 7:28 AM
Status
Deferred
Published
Aug 3, 2026, 7:16 AM
Modified
Aug 26, 2026, 4:31 PM