The Pixar ruby-jss gem before 1.6.0 allows remote attackers to execute arbitrary code because of the Plist gem’s documented behavior of using Marshal.load during XML document processing.
github.com/advisories/GHSA-vmfh-c547-v45h
github.com/patsplat/plist/tree/ce8f9ae42a114f603ea200c955e420782bffc4ad#label-Security+considerations
github.com/PixarAnimationStudios/ruby-jss
github.com/PixarAnimationStudios/ruby-jss/blob/e6d48dd8c77f9275c76787d60d3472615fcd9b77/CHANGES.md#160---2021-05-24
github.com/rubysec/ruby-advisory-db/blob/master/gems/ruby-jss/CVE-2021-33575.yml
nvd.nist.gov/vuln/detail/CVE-2021-33575