CVE-2025-4334CWE-269privilege-escalation

CVE-2025-4334

Critical · published June 26, 2025

CVSS v3.1
9.8
EPSS
3%
Percentile
85.2
In the wild
Unconfirmed
What it is

🚨 Unauthenticated attackers can register as administrators! The Simple User Registration plugin for WordPress is leaking like a sieve, allowing anyone to don the admin cape! 🔥 Think of it like a hotel that forgot to check IDs during check-in — anyone can walk in and claim to be the manager, no questions asked. This vulnerability allows unauthorized users to elevate their privileges as easily as checking into a VIP suite without any credentials! An unauthorized user could stroll right into your WordPress site with admin privileges. This means they can change settings, delete content, or even install malicious plugins — it’s an absolute nightmare waiting to happen! If you’re running this plugin, you’re leaving the front door wide open for a hostile takeover.

Put simply

Think of it like a hotel that forgot to check IDs during check-in — anyone can walk in and claim to be the manager, no questions asked. This vulnerability allows unauthorized users to elevate their privileges as easily as checking into a VIP suite without any credentials! This privilege escalation issue is caused by insufficient restrictions on user meta values during registration, making it possible for anyone to become an admin without the proper authentication check.

What to do

An unauthorized user could stroll right into your WordPress site with admin privileges. This means they can change settings, delete content, or even install malicious plugins — it’s an absolute nightmare waiting to happen! If you’re running this plugin, you’re leaving the front door wide open for a hostile takeover. Immediately update the Simple User Registration plugin to version 6.4 or later to patch this vulnerability. Additionally, review the user registration process and implement strict validation checks on user meta values to prevent unauthorized privilege escalation. Don't delay! You’ve got this! With a quick update, you can lock down your site and keep those pesky attackers at bay! 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.02588 · 85.2th percentile
Weakness
CWE-269 · Improper Privilege Management
Published
2025-06-26T06:15Z
Affected products (1)
ProductVersionsFixed in
najeebmedia/memberhero≤ 6.3—
References (3)
EPSS history
Timeline
  • 26 JUN 02:06Z
    Simple User Registration <= 6.3 - Unauthenticated Privilege Escalation
    cvelistv5