CVE-2021-33575 json
Remote code execution in ruby-jss
published 2021-05-25 5 y ago modified 2026-06-17 4 mo ago also GHSA-vmfh-c547-v45h , EUVD-2021-2261
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.6%
- EPSS 2.6% chance of exploitation in 30 days, percentile 85%
- public exploits
- 0
- none known
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.
Patch / fix
- rubygems ruby-jss 1.6.0
- pixar ruby-jss 1.6.0
Exploit prediction
2.60% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| rubygems | ruby-jss | <1.6.0 |
1.6.0 |
References
-
github.com
/PixarAnimationStudios/ruby-jss/blob/e6d48dd8c77f9275c76787d60d3472615fcd9b77/CHANGES.md#160---2021-05-24
web, release-notes, third-party-advisory
-
github.com
/patsplat/plist/tree/ce8f9ae42a114f603ea200c955e420782bffc4ad#label-Security+considerations
web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-33575
advisory
-
github.com
/PixarAnimationStudios/ruby-jss
package
-
github.com
/advisories/GHSA-vmfh-c547-v45h
advisory
-
github.com
/rubysec/ruby-advisory-db/blob/master/gems/ruby-jss/CVE-2021-33575.yml
web
Sources
- CVE List CVE-2021-33575
- GitHub Advisory GHSA-vmfh-c547-v45h
- NVD CVE-2021-33575
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.