XML Injection (aka Blind XPath Injection)
OpenMage Magento LTS is an alternative to the Magento CE official releases. Prior to versions 19.4.15 and 20.0.13, layout XML enabled admin users to execute arbitrary commands via block methods. The latest OpenMage Versions up from v19.4.15 and v20.0.13 have this Issue patched.
CWE-91 - XML Injection (aka Blind XPath Injection)
The software does not properly neutralize special elements that are used in XML, allowing attackers to modify the syntax, content, or commands of the XML before it is processed by an end system.