CVE-2026-15930

CRITICAL

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

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References
Exploit exploit vdb-entry technical-description
https://wpscan.com/vulnerability/e46948f1-0e06-4e76-8fc8-df661eb786a5/

Scores

CVSS v3 9.4
EPSS 0.0023
EPSS Percentile 14.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-862
Status published
Products (1)
None/Simple Membership < 4.7.8
Published Aug 03, 2026
Tracked Since Aug 03, 2026