Authentication Bypass in User Registration & Membership Plugin for WordPress
CVE-2026-1779

8.1HIGH

Key Information:

Vendor

WordPress
Status
User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder
Vendor
CVE Published:
26 February 2026

What is CVE-2026-1779?

The User Registration & Membership plugin for WordPress is susceptible to an authentication bypass, allowing unauthenticated attackers to log in as a newly registered user. This vulnerability arises from inadequate authentication checks within the 'register_member' function, particularly affecting versions up to 5.1.2. If the 'urm_user_just_created' user meta is set, an attacker can exploit this flaw to gain access without valid credentials, posing significant security risks to affected WordPress sites.

Affected Version(s)

User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder 0 <= 5.1.2

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/user-registrat...

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Jude Nwadinobi
.