CVE-2021-36040CWE-20

Magento Commerce Improper Input Validation Could Lead To Remote Code Execution

Critical · published September 1, 2021

CVSS v3.1
9.1
EPSS
3%
Percentile
86.7
In the wild
Unconfirmed
What it is

🚨 An improperly validated file upload in Magento puts your entire site at risk! An admin could upload a malicious file and gain remote code execution access—yikes! 🔥 Think of it like a restaurant where a sneaky chef slips in an unauthorized ingredient through the back door, entirely bypassing the kitchen's quality checks. If that ingredient's spoiled, the whole menu could be compromised! With this vulnerability, an attacker with admin privileges could upload a specially crafted file, leading to remote code execution. This means they could potentially execute any code on your server, steal sensitive data, or even take complete control of your website—utter chaos!

Put simply

Think of it like a restaurant where a sneaky chef slips in an unauthorized ingredient through the back door, entirely bypassing the kitchen's quality checks. If that ingredient's spoiled, the whole menu could be compromised! This vulnerability arises from improper input validation in Magento Commerce versions up to 2.4.2-p1 and 2.3.7, allowing an attacker to bypass file extension restrictions when uploading files. The result? Full remote code execution!

What to do

With this vulnerability, an attacker with admin privileges could upload a specially crafted file, leading to remote code execution. This means they could potentially execute any code on your server, steal sensitive data, or even take complete control of your website—utter chaos! To protect your site, immediately update your Magento Commerce to version 2.4.2-p2 or later, or 2.3.7-p1 or later. Additionally, review your file upload policies and implement strict input validation to bolster your defenses. 🔒 You've got this! Follow these steps, and you’ll secure your site in no time! 🛡️

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.02867 · 86.7th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2021-09-01T14:31Z
EPSS history
Timeline
  • 01 SEP 14:31Z
    Magento Commerce Improper Input Validation Could Lead To Remote Code Execution
    cvelistv5