CVE-2021-20309
7.5 · HIGHOverview
CVE-2021-20309 is a high-severity vulnerability affecting imagemagick imagemagick. It was published on May 11, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
A flaw was found in ImageMagick in versions before 7.0.11 and before 6.9.12, where a division by zero in WaveImage() of MagickCore/visual-effects.c may trigger undefined behavior via a crafted image file submitted to an application using ImageMagick. The highest threat from this vulnerability is to system availability.
Remediation
Check the references section for vendor advisories and patches from imagemagick. Update imagemagick 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 |
|---|---|---|---|
| imagemagick | imagemagick | >= 0, < 6.9.12 | Affected |
References
Frequently Asked Questions
What is CVE-2021-20309?
CVE-2021-20309 is a high-severity vulnerability affecting imagemagick imagemagick. It was published on May 11, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2021-20309?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-20309?
Check the references section for vendor advisories and patches from imagemagick. Update imagemagick 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-2021-20309?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-20309 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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Browser-based exploitation validates findings with real proof-of-concept.
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