CVE-2025-4334
Simple User Registration <= 6.3 - Unauthenticated Privilege Escalation
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-269 |
| Vendor | nmedia |
| Product | simple user registration |
| Published | Jun 26, 2025 |
| Last Updated | Apr 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
nmedia / Simple User Registration
0 ≤ 6.3
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/c211e0c0-3086-43d2-853c-489f9c42b0ab?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/wp-registration/trunk/inc/classes/class.register.php#L135 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset/3327946/
Credits
Cheng Liu