CVE-2021-47918CWE-89

Simple CMS 2.1 SQL Injection Vulnerability via Users Module

High · published February 1, 2026

CVSS v4.0
8.6
EPSS
1%
Percentile
46.8
In the wild
Unconfirmed
What it is

⚡ Privileged attackers can unleash chaos with a simple SQL injection in the Simple CMS 2.1! Just one unfiltered input can let them commandeer your database. 🔥 Think of it like a restaurant where a diner can sneak in and change the entire menu without anyone checking their ID. One unchecked request in the admin.php file allows bad actors to serve themselves everything on the back-end! This means an attacker could gain full control over your database, potentially accessing, altering, or even erasing sensitive user information. The consequences could be absolutely devastating for your organization, from data breaches to complete service outages.

Put simply

Think of it like a restaurant where a diner can sneak in and change the entire menu without anyone checking their ID. One unchecked request in the admin.php file allows bad actors to serve themselves everything on the back-end! CVE-2021-47918 is a remote SQL injection vulnerability found in Simple CMS 2.1. It allows attackers to inject and execute unfiltered SQL commands through the users module by exploiting unvalidated parameters in the admin.php file.

What to do

This means an attacker could gain full control over your database, potentially accessing, altering, or even erasing sensitive user information. The consequences could be absolutely devastating for your organization, from data breaches to complete service outages. To protect your system, patch Simple CMS to the latest version immediately. Additionally, ensure that all input parameters are properly validated and sanitized to prevent SQL injection attacks. Regularly review your security configurations and audit your database access controls. You've got this! By taking these steps, you're stepping up as a security hero and fortifying your defenses. 🛡️

The record
Technical detail
CVSS v4.0
8.6 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS
0.00575 · 46.8th percentile
Weakness
CWE-89 · Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Published
2026-02-01T12:15Z
EPSS history
Timeline
  • 01 FEB 12:15Z
    Simple CMS 2.1 SQL Injection Vulnerability via Users Module
    cvelistv5