CVE-2021-21426: Openmage Magento

Critical severity, CVSS 9.8. EPSS: 1.2% chance of exploitation in the next 30 days.

Magento-lts is a long-term support alternative to Magento Community Edition (CE). In magento-lts versions 19.4.12 and prior and 20.0.8 and prior, there is a vulnerability caused by the unsecured deserialization of an object. A patch in versions 19.4.13 and 20.0.9 was back ported from Zend Framework 3. The vulnerability was assigned CVE-2021-3007 in Zend Framework.

Affected products

• Openmage Magento: before 19.4.13 (fixed in 19.4.13); from 20.0.0, before 20.0.9 (fixed in 20.0.9)

Published 2021-04-21. Last modified 2026-06-17.