Medium severity · published Jul 17, 2026
CVE-2026-11966
User Registration & Membership < 5.2.3 - Unauthenticated Limited User Deletion via Stripe Subscription Handler
5.3
CVSS
0.3%
EPSS
No
On KEV
Description
The User Registration & Membership WordPress plugin before 5.2.3 does not perform a capability check for unauthenticated callers on one of its membership payment actions and acts on a caller-supplied user identifier, allowing unauthenticated attackers to delete recently-registered, payment-pending user accounts.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UR
User Registration & Membership ·
4.2.3 before 5.2.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-11966
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-11966
wpscan.com
https://wpscan.com/vulnerability/8e3be064-b3b7-4d68-960b-8c850c3e6f77/
More from User Registration & Membership
9.1
CVE-2026-11964
User Registration & Membership < 5.2.2 - Unauthenticated PayPal Webhook Signature Verification Bypass Leading to Membership Activation
8.1
CVE-2026-11961
User Registration & Membership < 5.2.3 - Unauthenticated Privilege Escalation via Unbound members_data Membership ID
8.1
CVE-2026-11963
User Registration & Membership < 5.2.2 - Subscriber+ Cross-User Role and Membership Tier Modification via IDOR
8.1
CVE-2025-2594
User Registration & Membership < 4.1.3 - Authentication Bypass
8.1
CVE-2025-2563
User Registration & Membership < 4.1.2- Unauthenticated Privilege Escalation