CVE-2021-21289

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

3.54% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 89.2% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/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

2021-02-02 18:50Z5 YR AGO

Last updated

2024-08-03 18:09Z2 YR AGO

Reserved

2020-12-22

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

High (CVSS 7.4)

CNA CVSS vector

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

Weaknesses

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

Data version

5.1

Document digest

f468c896fc64310bd250b8a7ce7726826c3a23a4e98999ed0d2156392a589917

• github.comhttps://github.com/sparklemotion/mechanize/security/advisories/GHSA-qrqm-fpv6-6r8gx_refsource_CONFIRM
• rubygems.orghttps://rubygems.org/gems/mechanize/x_refsource_MISC
• github.comhttps://github.com/sparklemotion/mechanize/releases/tag/v2.7.7x_refsource_MISC
• github.comhttps://github.com/sparklemotion/mechanize/commit/66a6a1bfa653a5f13274a396a5e5441238656aa0x_refsource_MISC
• lists.fedoraproject.orgFEDORA-2021-24fdc228e4https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LBVVJUL4P4KCJH4IQTHFZ4ATXY7XXZPV/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-db8ebc547ehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YNFZ7ROYS6V4J5L5PRAJUG2AWC7VXR2V/vendor-advisoryx_refsource_FEDORA
• lists.debian.org[debian-lts-announce] 20210216 [SECURITY] [DLA 2561-1] ruby-mechanize security updatehttps://lists.debian.org/debian-lts-announce/2021/02/msg00021.htmlmailing-listx_refsource_MLIST
• security.gentoo.orgGLSA-202107-17https://security.gentoo.org/glsa/202107-17vendor-advisoryx_refsource_GENTOO