Arbitrary file upload in Sitemagic Cms
CVE-2023-53921
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.
Vulnerability class: Unrestricted File Upload
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.010 (60.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.010 · change: +0.000
Affected products
- Sitemagic Cms — versions 4.4.3
- Sitemagic Sitemagiccms — versions 4.4.3
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/51464 (Exploit, Third Party Advisory, exploit)
- sitemagic.org/Download.html (Product, product)
- www.vulncheck.com/advisories/sitemagiccms-remote-code-execution-via-unrestricte… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2023-53921?
- CVE-2023-53921 is a critical-severity vulnerability in Sitemagic Cms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2025-12-17.
- How severe is CVE-2023-53921?
- Critical severity. CVSS v3 base score is 9.8 out of 10.