Privilege escalation in User Registration & Membership
CVE-2026-11961
The User Registration & Membership WordPress plugin before 5.2.3 does not validate that the membership tier submitted during public registration is one of the tiers allowed by the registration form before assigning that tier's associated user role, allowing unauthenticated users to register into an arbitrary published membership tier and obtain its role — up to administrator when such a tier exists.
Vulnerability class: Privilege Escalation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (31.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- User Registration & Membership — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- wpscan.com/vulnerability/2ffab574-8626-472e-b6e4-09bcbaa62349/ (technical-description, exploit, vdb-entry)
Frequently asked questions
- What is CVE-2026-11961?
- CVE-2026-11961 is a high-severity vulnerability in User Registration & Membership, classified under Improper Privilege Management. CVSS score: 8.1/10. Published 2026-07-17.
- How severe is CVE-2026-11961?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2026-11961 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.