CVE-2025-4334

EUVD-2025-19388
The Simple User Registration plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 6.3. This is due to insufficient restrictions on user meta values that can be supplied during registration. This makes it possible for unauthenticated attackers to register as an administrator.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
WordfenceCNA
9.8 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 96%
Affected Products (NVD)
VendorProductVersion
najeebmediasimple_user_registration
𝑥
≤ 6.3
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://plugins.trac.wordpress.org/browser/wp-registration/trunk/inc/classes/class.register.php#L135
https://www.wordfence.com/threat-intel/vulnerabilities/id/c211e0c0-3086-43d2-853c-489f9c42b0ab?source=cve