CVE-2023-53921 SitemagicCMS 4.4.3 Remote Code Execution via Unrestricted File Upload

High 8.7 Published 17 Dec 2025 Updated 7 Apr 2026

Attackers can upload malicious PHP files to execute arbitrary system commands on SitemagicCMS installations.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-53921?

CVE-2023-53921 is a high-severity vulnerability in SitemagicCMS, published on 17 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

SitemagicCMS 4.4.3 contains a remote code execution vulnerability that allows attackers to upload malicious PHP files to the files/images directory. Attackers can upload a .phar file with system command execution payload to compromise the web application and execute arbitrary system commands.

Weakness: CWE-434

Which versions are affected by CVE-2023-53921?

It affects 1 product.

Products include Sitemagic Sitemagic Cms.

How do I fix CVE-2023-53921?

No fix has been published for CVE-2023-53921 yet. Limit exposure of the affected software until one is available.

Is CVE-2023-53921 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-53921 exists.

CVE-2019-9042 File upload in n/a High 7.2

Sources

Also known as GHSA-wjjc-cc9v-hq6j.