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CVE-2025-4334

Simple User Registration <= 6.3 - Unauthenticated Privilege Escalation

CVSS 9.8 CRITICALEPSS 2.1%CWE-269
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
nmedia · Simple User Registration
public PoCs found — 2
githubgithub.com/Nxploited/CVE-2025-4334★ 7githubgithub.com/0xgh057r3c0n/CVE-2025-4334★ 3
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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References
https://plugins.trac.wordpress.org/browser/wp-registration/trunk/inc/classes/class.register.php#L135https://plugins.trac.wordpress.org/changeset/3327946/https://www.wordfence.com/threat-intel/vulnerabilities/id/c211e0c0-3086-43d2-853c-489f9c42b0ab?source=cve