CVE-2026-11961
HIGHUser Registration & Membership < 5.2.3 - Unauthenticated Privilege Escalation via Unbound members_data Membership ID
Title source: cnaDescription
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.
References (1)
Core 1
Core References
Exploit exploit
vdb-entry
technical-description
https://wpscan.com/vulnerability/2ffab574-8626-472e-b6e4-09bcbaa62349/
Scores
CVSS v3
8.1
EPSS
0.0025
EPSS Percentile
16.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-269
Status
published
Products (1)
None/User Registration & Membership
< 5.2.3
Published
Jul 17, 2026
Tracked Since
Jul 17, 2026