CVE-2023-53921CWE-434

SitemagicCMS 4.4.3 Remote Code Execution via Unrestricted File Upload

High · published December 17, 2025

CVSS v4.0
8.7
EPSS
1%
Percentile
61.1
In the wild
Unconfirmed
What it is

🚨 A crafty attacker could sneak in a malicious .phar file and wreak havoc on your SitemagicCMS setup. 🔥 Think of it like a sneaky delivery person who slips a hidden package through the back door, full of surprises that could harm your entire operation. This vulnerability lets attackers upload dangerous PHP files straight into your files/images directory, just like an unverified package being accepted without any checks! If exploited, a malicious actor could execute arbitrary commands on your server, opening the door to data breaches, unauthorized access, or even total system takeover! Imagine the chaos of a thief being able to control the entire house just because they managed to slip in through an unguarded entry point.

Put simply

Think of it like a sneaky delivery person who slips a hidden package through the back door, full of surprises that could harm your entire operation. This vulnerability lets attackers upload dangerous PHP files straight into your files/images directory, just like an unverified package being accepted without any checks! CVE-2023-53921 allows remote code execution by letting attackers upload malicious PHP files (specifically .phar files) into the files/images directory, enabling them to execute arbitrary system commands.

What to do

If exploited, a malicious actor could execute arbitrary commands on your server, opening the door to data breaches, unauthorized access, or even total system takeover! Imagine the chaos of a thief being able to control the entire house just because they managed to slip in through an unguarded entry point. To protect yourself, upgrade SitemagicCMS to version 4.4.4 or later immediately. Also, review your file upload mechanisms to ensure only safe file types are permitted and consider implementing additional security measures like file validation. You've got this! With a quick update and some vigilance, you can keep your SitemagicCMS secure! 🛡️

The record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00958 · 61.1th percentile
Weakness
CWE-434 · Unrestricted Upload of File with Dangerous Type
Published
2025-12-17T22:44Z
EPSS history
Timeline
  • 17 DEC 22:44Z
    SitemagicCMS 4.4.3 Remote Code Execution via Unrestricted File Upload
    cvelistv5