CVE-2023-53921
9.8 · CRITICALOverview
CVE-2023-53921 is a critical-severity vulnerability affecting sitemagic sitemagic_cms. It was published on December 17, 2025 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from sitemagic. Update sitemagic_cms to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
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Frequently Asked Questions
What is CVE-2023-53921?
CVE-2023-53921 is a critical-severity vulnerability affecting sitemagic sitemagic_cms. It was published on December 17, 2025 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2023-53921?
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2023-53921?
Check the references section for vendor advisories and patches from sitemagic. Update sitemagic_cms to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2023-53921?
CyberStrike's AI-powered security agents can automatically detect CVE-2023-53921 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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