What’s Vulnerable › Vulnerabilities

CVE-2025-4334: Simple User Registration <= 6.3 - Unauthenticated Privilege Escalation

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-06-26 · updated 2026-08-11
• Weakness: CWE-269

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.

Affected products

• Najeebmedia Memberhero: through 6.3

References

• https://plugins.trac.wordpress.org/browser/wp-registration/trunk/inc/classes/class.register.php#L135
• https://plugins.trac.wordpress.org/changeset/3327946/
• https://www.wordfence.com/threat-intel/vulnerabilities/id/c211e0c0-3086-43d2-853c-489f9c42b0ab?source=cve

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