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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
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.
- Record
CVE-2025-4334- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-269
- Updated
- 2026-11-02
EUVDEUVD-2025-19388
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.
- Record
EUVD-2025-19388- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-6hwf-c64w-jxc6
The Simple User Registration plugin for WordPress is vulnerable to Privilege Escalation in all...
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.
- Record
GHSA-6hwf-c64w-jxc6- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-269
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2025-4334- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-269
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Nuclei | Simple User Registration <= 6.3 - Unauthenticated Privilege Escalation | |
| PoC in GitHub | 0xgh057r3c0n/CVE-2025-4334 | 2025-08-18 |
| PoC in GitHub | Nxploited/CVE-2025-4334 | 2025-06-26 |
| PoC in GitHub | vinodwick/CVE-2025-4334 | 2025-10-25 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, Nuclei, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-4334 is a critical vulnerability (CVSS 9.8) in Nmedia Simple User Registration, published June 26, 2025. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 2.59%, the 85th percentile. No source names a fixed version.
References
wordfence.com/threat-intel/vulnerabilities/id/c211e0c0-3086-43d2-853c-489f9c42b0ab?source=cve
plugins.trac.wordpress.org/browser/wp-registration/trunk/inc/classes/class.register.php
nvd.nist.gov/vuln/detail/CVE-2025-4334
github.com/advisories/GHSA-6hwf-c64w-jxc6