User Registration & Membership < 5.2.3 - Unauthenticated Privilege Escalation via Unbound members_data Membership ID
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 8.1epss 0.2%
from disclosure to weapon21 days
Published on NVDJul 17
1st PoC+21d
exploitation probability
0.2%top 84% of all CVEs
observed exploitation
nono source reports it
2 public exploit(s)
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Unknown · User Registration & Membershippublic PoCs found — 2
githubgithub.com/JohenLastGen-JLG/CVE-2026-11961★ 1cve_referencewpscan.com/vulnerability/2ffab574-8626-472e-b6e4-09bcbaa62349/unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.