What’s Vulnerable › Vulnerabilities
CVE-2026-15930: Simple Membership < 4.7.8 - Unauthenticated Administrator Account Takeover via Registration Username Collision
- Severity: critical (CVSS 9.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-03 · updated 2026-08-26
- Weakness: CWE-862
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
- Simple Membership: before 4.7.8 — fixed in 4.7.8
How to fix
Upgrade to a fixed version: Simple Membership 4.7.8. Check the vendor advisory for mitigations.
References
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