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

> Unauthenticated attackers can register as administrators due to insufficient restrictions on user meta values during registration.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 26 Jun 2025
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-6hwf-c64w-jxc6

## What is CVE-2025-4334?

CVE-2025-4334 is a critical vulnerability in nmedia Simple User Registration, published on 26 Jun 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-269 (Improper Privilege Management)

## Which versions are affected by CVE-2025-4334?

It affects 1 product.


Products: Najeebmedia Memberhero.

## How do I fix CVE-2025-4334?

No fix has been published for CVE-2025-4334 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-4334 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-4334 exists.

Public exploit code:

- Simple User Registration <= 6.3 - Unauthenticated Privilege Escalation (github_poc): https://github.com/Nxploited/CVE-2025-4334
- Proof-of-concept exploit for CVE-2025-4334, a privilege escalation vulnerability in the Simple User Registration WordPress plugin (<= 6.3), allowing unauthenticated attackers to create administrator accounts. (github_poc): https://github.com/0xgh057r3c0n/CVE-2025-4334
- 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. (github_poc): https://github.com/vinodwick/CVE-2025-4334
- Simple User Registration <= 6.3 - Unauthenticated Privilege Escalation (nuclei): http/cves/2025/CVE-2025-4334.yaml

## Other vulnerabilities in nmedia Simple User Registration

- [CVE-2024-49604](https://insights.sbomify.com/CVE-2024-49604/): WordPress Simple User Registration plugin <= 6.7 - Broken Authentication vulnerability (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-4334 and fix it if it is affected.

What it is: CVE-2025-4334 is a critical vulnerability in nmedia Simple User Registration, published on 26 Jun 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-4334 exists.

Affected product: nmedia Simple User Registration. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-4334/ (Markdown: https://insights.sbomify.com/CVE-2025-4334/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-4334
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-4334
- OSV: https://osv.dev/vulnerability/CVE-2025-4334

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-4334/
Summaries are generated and may contain mistakes; the official description above is the record.