In Magento (rubygems openmage/magento-lts package) before versions 19.4.8 and 20.0.4, an admin user can generate soap credentials that can be used to trigger RCE via PHP Object Injection through product attributes and a product. The issue is patched in versions 19.4.8 and 20.0.4.
https://github.com/OpenMage/magento-lts/security/advisories/GHSA-jrgf-vfw2-hj26
https://github.com/OpenMage/magento-lts/commit/26433d15b57978fcb7701b5f99efe8332ca8630b