The Pixar ruby-jss gem before 1.6.0 allows remote attackers to execute arbitrary code…
Priority MEDIUM 47Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.
Summary
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.
Why it matters now
EPSS 0.02603 85th percentileScored 2026-11-07
Fix Fixed ruby-jss (RubyGems): 1.6.0
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | ruby-jss (RubyGems) | before 1.6.0 | 1.6.0 | Patch available | GHSA-vmfh-c547-v45h |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- ruby-jss (RubyGems) Vendor— Affected before 1.6.0 Fixed in 1.6.0 Patch available GHSA-vmfh-c547-v45h
Remediation
- Fix · GHSA-vmfh-c547-v45h ruby-jss (RubyGems) Fixed in 1.6.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2021-33575
- 2026-10-03 Alias added: GHSA-vmfh-c547-v45h
References
Advisory 4
- https://github.com/PixarAnimationStudios/ruby-jss/blob/e6d48dd8c77f9275c76787d60d3472615fcd9b77/CHANGES.md#160---2021-05-24
- https://github.com/patsplat/plist/tree/ce8f9ae42a114f603ea200c955e420782bffc4ad#label-Security+considerations
- https://nvd.nist.gov/vuln/detail/CVE-2021-33575
- https://github.com/advisories/GHSA-vmfh-c547-v45h
Sources
- CVE-2021-33575 · CVE Program
- CVE-2021-33575 · NVD
- FIRST EPSS
- GHSA-vmfh-c547-v45h · GitHub Advisory Database · CC BY 4.0
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