What is CVE-2026-15930?

CVE-2026-15930 is a critical-severity vulnerability in Simple Membership, classified under Missing Authorization. CVSS score: 9.4/10. Published 2026-08-03.

How severe is CVE-2026-15930?

Critical severity. CVSS v3 base score is 9.4 out of 10.

Auth bypass in Simple Membership

CVE-2026-15930

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.

Vulnerability class: Broken Access Control

EPSS: 0.003 (17.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.4 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H.

Affected products

Unknown Simple Membership — versions 0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-15930?: CVE-2026-15930 is a critical-severity vulnerability in Simple Membership, classified under Missing Authorization. CVSS score: 9.4/10. Published 2026-08-03.
How severe is CVE-2026-15930?: Critical severity. CVSS v3 base score is 9.4 out of 10.