CVE-2021-31799

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

1.48% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 72.1% of scored records. A rank, not a probability.

NVD base score

7.0 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-07-29 00:00Z5 YR AGO

Last updated

2024-10-15 20:28Z1 YR AGO

Reserved

2021-04-25

Assigning CNA

mitre

Record state

PUBLISHED

Severity

High (CVSS 7.0)

CNA CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')Base
• CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')Class

Data version

5.1

Document digest

cfa28fa60415196a3aaee4ffdd87499bc7d8ae65e8356a4f8546debeacc1a1b0

• lists.debian.org[debian-lts-announce] 20211013 [SECURITY] [DLA 2780-1] ruby2.3 security updatehttps://lists.debian.org/debian-lts-announce/2021/10/msg00009.htmlmailing-list
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuapr2022.html
• www.ruby-lang.orghttps://www.ruby-lang.org/en/news/2021/05/02/os-command-injection-in-rdoc/
• security-tracker.debian.orghttps://security-tracker.debian.org/tracker/CVE-2021-31799
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20210902-0004/
• security.gentoo.orgGLSA-202401-05https://security.gentoo.org/glsa/202401-05vendor-advisory