CVE-2021-39212: Issue when Configuring the ImageMagick Security Policy

Severity: low (CVSS 3.6 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-09-13 · updated 2026-06-17
Weakness: CWE-668

Description

ImageMagick is free software delivered as a ready-to-run binary distribution or as source code that you may use, copy, modify, and distribute in both open and proprietary applications. In affected versions and in certain cases, Postscript files could be read and written when specifically excluded by a `module` policy in `policy.xml`. ex. <policy domain="module" rights="none" pattern="PS" />. The issue has been resolved in ImageMagick 7.1.0-7 and in 6.9.12-22. Fortunately, in the wild, few users utilize the `module` policy and instead use the `coder` policy that is also our workaround recommendation: <policy domain="coder" rights="none" pattern="{PS,EPI,EPS,EPSF,EPSI}" />.

Affected products

ImageMagick: from 6.9.12-0 before 6.9.12-22; from 7.1.0-0 before 7.1.0-7 — fixed in 6.9.12-22, 7.1.0-7

How to fix

Upgrade to a fixed version: ImageMagick 6.9.12-22, 7.1.0-7. Check the vendor advisory for mitigations.

References

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