Vulnerability · Published Jul 13, 2026 · Assigned by WPScan
CVE-2026-11963User Registration & Membership < 5.2.2 - Subscriber+ Cross-User Role and Membership Tier Modification via IDOR
High 8.1
In plain English
A high-severity security flaw in User Registration & Membership from Unknown. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities).
Severity (CVSS 3.1)8.1High
Exploit odds (30 days)0.4%top 71.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
The User Registration & Membership WordPress plugin before 5.2.2 does not perform an authorization check on a membership-upgrade action and derives the user to modify from a caller-supplied identifier instead of the current user, allowing any authenticated user such as a subscriber to change another user's WordPress role and membership tier.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Unknown | User Registration & Membership | 0 – before 5.2.2 |
References
- https://wpscan.com/vulnerability/a34a916a-983e-48a5-8f10-99214ee3b613/ exploit, vdb-entry, technical-description