CVE-2021-36040: Magento has a file extension restrictions bypass

May 24, 2022 (updated November 7, 2025)

Magento Commerce versions 2.4.2 (and earlier), 2.4.2-p1 (and earlier) and 2.3.7 (and earlier) are affected by an improper input validation vulnerability. An attacker with admin privileges can upload a specially crafted file to bypass file extension restrictions and could lead to remote code execution.

References

github.com/advisories/GHSA-2pq5-gpqf-g4r3
github.com/magento/magento2
helpx.adobe.com/security/products/magento/apsb21-64.html
nvd.nist.gov/vuln/detail/CVE-2021-36040

Code Behaviors & Features

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