Vulnerability · Published Aug 3, 2026 · Assigned by WPScan

CVE-2026-15930Simple Membership < 4.7.8 - Unauthenticated Administrator Account Takeover via Registration Username Collision

Critical 9.4

In plain English

A critical-severity missing authorization in Simple Membership from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities).

Severity (CVSS 3.1)9.4Critical

Exploit odds (30 days)0.4%top 63.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Unknown	Simple Membership	0 – before 4.7.8

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

References

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