CVE-2025-4334

Simple User Registration <= 6.3 - Unauthenticated Privilege Escalation

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

nmedia · Simple User Registration

CVSS v3.1 WORDFENCE

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

2.59% chance of exploitation in the next 30 days, 85th percentile

Nuclei

critical · CWE-269

Published

2025-06-26

Updated

2026-04-08

Proof-of-concept exploits (3)

• 0xgh057r3c0n/CVE-2025-43343★ · 2025-10-08
• Nxploited/CVE-2025-43347★ · 2025-06-26
• vinodwick/CVE-2025-43341★ · 2025-10-25

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-4334.yaml

Security advisories

• https://www.wordfence.com/threat-intel/vulnerabilities/id/c211e0c0-3086-43d2-853c-489f9c4…
• https://plugins.trac.wordpress.org/browser/wp-registration/trunk/inc/classes/class.regist…
• https://plugins.trac.wordpress.org/changeset/3327946

References

• CVE Record
• NVD entry

Related

• CVE-2025-13486
• CVE-2025-25257
• CVE-2025-2775
• CVE-2025-2776
• CVE-2025-2777
• CVE-2025-3102