Home/CVE/In RDoc 3.11 through 6.x before 6.3.1, as distributed with Ruby through 3.0.1, it is possible to execute arbitrary code
CVE

CVE-2021-31799

In RDoc 3.11 through 6.x before 6.3.1, as distributed with Ruby through 3.0.1, it is possible to execute arbitrary code

In RDoc 3.11 through 6.x before 6.3.1, as distributed with Ruby through 3.0.1, it is possible to execute arbitrary code via | and tags in a filename.

HIGH · CVSS 7 EPSS 0.00351
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules3 YARA rules0
⬡

Weakness Classification

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
▤

Affected Products & Versions

3
debian linuxall versions
ruby-lang rdoc>= 3.11 and < 6.3.1
oracle jd edwards enterpriseone tools< 9.2.6.1
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
RubyGems rdoc HIGH fixed in 6.1.2.1
◈

Sigma Hunt Rules

3
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumRuby on Rails Framework Exceptions
productmediumPotential Ruby Reverse Shell
productmediumRuby Inline Command Execution
▣

Scoring & Timeline

7
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD30 Jul 2021 · 02:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

23
suse-csafopenSUSE-SU-2025:15819-1
suse-csafopenSUSE-SU-2025:14621-1
suse-csafopenSUSE-SU-2024:11622-1
suse-csafopenSUSE-SU-2024:11623-1
suse-csafopenSUSE-SU-2024:11786-1
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://lists.debian.org/debian-lts-announce/2021/10/msg00009.htmlThird Party Advisory
https://security-tracker.debian.org/tracker/CVE-2021-31799Third Party Advisory
https://security.gentoo.org/glsa/202401-05
https://security.netapp.com/advisory/ntap-20210902-0004/Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlPatchThird Party Advisory
https://www.ruby-lang.org/en/news/2021/05/02/os-command-injection-in-rdoc/PatchVendor Advisory
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