What’s Vulnerable › Vulnerabilities
CVE-2026-86406: User Registration & Membership < 5.2.8 - Subscriber+ Privilege Escalation via Membership Purchase
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-13 · updated 2026-09-14
- Weakness: CWE-269
Description
The User Registration & Membership WordPress plugin before 5.2.8 does not check the capability of the user making a membership purchase, and does not validate the payment method or the plan submitted with it, allowing any authenticated user such as a subscriber to be granted the WordPress role attached to a paid plan without paying for it. Where the site owner has mapped a plan to a privileged role, this leads to privilege escalation up to administrator.
Affected products
- User Registration & Membership: from 4.4.6 before 5.2.8 — fixed in 5.2.8
How to fix
Upgrade to a fixed version: User Registration & Membership 5.2.8. Check the vendor advisory for mitigations.
References
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