CVE-2021-21956
7.8 · HIGHOverview
CVE-2021-21956 is a high-severity vulnerability affecting cloudlinux imunify360. It was published on April 14, 2022 and has a CVSS 3.1 base score of 7.8 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical Description
A php unserialize vulnerability exists in the Ai-Bolit functionality of CloudLinux Inc Imunify360 5.10.2. A specially-crafted malformed file can lead to potential arbitrary command execution. An attacker can provide a malicious file to trigger this vulnerability.
Remediation
Check the references section for vendor advisories and patches from cloudlinux. Update imunify360 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-2021-21956?
CVE-2021-21956 is a high-severity vulnerability affecting cloudlinux imunify360. It was published on April 14, 2022 and has a CVSS 3.1 base score of 7.8 (HIGH).
How severe is CVE-2021-21956?
This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-21956?
Check the references section for vendor advisories and patches from cloudlinux. Update imunify360 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-2021-21956?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-21956 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.
Automated penetration testing that runs continuously, not just quarterly.
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