CVE-2026-80071: Unknown User Registration & Membership

High severity, CVSS 7.2. EPSS: 0.5% chance of exploitation in the next 30 days.

The User Registration & Membership WordPress plugin before 5.2.8 does not properly restrict who may author a membership plan or validate the plan a user attaches to their own account, allowing authenticated users with Author-level access and above to assign themselves an arbitrary role and escalate their privileges to Administrator.

Affected products

• Unknown User Registration & Membership: before 5.2.8 (fixed in 5.2.8)

Published 2026-09-13. Last modified 2026-09-14.