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

What is CVE-2021-39217?

CVE-2021-39217 is a high-severity command injection vulnerability in OpenMage magento-lts, published on 27 Jan 2023. An attacker needs administrator access to exploit it, with no action from the victim.

Official 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.

Weakness: CWE-77

Which versions are affected by CVE-2021-39217?

4 open source packages ship an affected version, including openmage/magento-lts. It affects 1 product.

Products include Openmage Magento.

How do I fix CVE-2021-39217?

Upgrade openmage/magento-lts to a fixed version for your release line: 19.4.22 or 20.0.19.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2021-39217 being exploited?

There is no known exploitation of CVE-2021-39217 in the wild and no public exploit code.

Other vulnerabilities in OpenMage magento-lts

• CVE-2021-21426 Fixes a bug in Zend Framework's Stream HTTP Wrapper Critical 9.8
• CVE-2021-21427 Backport for CVE-2021-21024 Blind SQLi from Magento 2 Critical 9.1
• CVE-2021-41144 OpenMage LTS authenticated remote code execution through layout update High 8.8
• CVE-2026-40488 OpenMage LTS has Customer File Upload Extension Blocklist Bypass that Leads to Remote Code Execution High 8.7
• CVE-2026-25524 OpenMage LTS's Phar Deserialization leads to Remote Code Execution High 8.1

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-c9q3-r4rv-mjm7.