Simple User Registration <= 6.3 - Unauthenticated Privilege Escalation

Improper Privilege Management
CVE CVE-2025-4334
CVSS Critical (9.8)
Publicly Published June 25, 2025
Last Updated July 24, 2025
Researcher Chuck
Description

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.

References

1 affected software package

Software Type Plugin
Software Slug wp-registration (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 6.3
Patched Version
  • 6.4
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