CVE-2021-39217: OpenMage LTS arbitrary command execution in custom layout update through blocks

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-01-27 · updated 2026-06-17
Weakness: CWE-77

Description

OpenMage LTS is an e-commerce platform. Prior to versions 19.4.22 and 20.0.19, Custom Layout enabled admin users to execute arbitrary commands via block methods. Versions 19.4.22 and 20.0.19 contain patches for this issue.

Affected products

OpenMage magento-lts: before 19.4.22; from 20.0.0 before 20.0.19 — fixed in 19.4.22, 20.0.19

How to fix

Upgrade to a fixed version: OpenMage magento-lts 19.4.22, 20.0.19. Check the vendor advisory for mitigations.

References

https://github.com/OpenMage/magento-lts/commit/289bd4b4f53622138e3e5c2d2cef7502d780086f
https://github.com/OpenMage/magento-lts/releases/tag/v19.4.22
https://github.com/OpenMage/magento-lts/releases/tag/v20.0.19
https://github.com/OpenMage/magento-lts/security/advisories/GHSA-c9q3-r4rv-mjm7
https://github.com/OpenMage/magento-lts/commit/289bd4b4f53622138e3e5c2d2cef7502d780086f
https://github.com/OpenMage/magento-lts/releases/tag/v19.4.22
https://github.com/OpenMage/magento-lts/releases/tag/v20.0.19
https://github.com/OpenMage/magento-lts/security/advisories/GHSA-c9q3-r4rv-mjm7

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