CVE-2021-21300

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

88.53% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 99.7% of scored records. A rank, not a probability.

NVD base score

7.5 (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: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

2021-03-09 00:00Z5 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 8.0)

CNA CVSS vector

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

Weaknesses

• CWE-59Improper Link Resolution Before File Access ('Link Following')Base

Data version

5.1

Document digest

5903974082253a2057faacf28cb26e0f741866913f3160c614d16705e307a56d

• github.comhttps://github.com/git/git/security/advisories/GHSA-8prw-h3cq-mghm
• lore.kernel.orghttps://lore.kernel.org/git/xmqqim6019yd.fsf%40gitster.c.googlers.com/
• git-scm.comhttps://git-scm.com/docs/git-config#Documentation/git-config.txt-coresymlinks
• git-scm.comhttps://git-scm.com/docs/gitattributes#_filter
• github.comhttps://github.com/git/git/commit/684dd4c2b414bcf648505e74498a608f28de4592
• www.openwall.com[oss-security] 20210309 git: malicious repositories can execute remote code while cloninghttp://www.openwall.com/lists/oss-security/2021/03/09/3mailing-list
• lists.fedoraproject.orgFEDORA-2021-63fcbd126ehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LCLJJLKKMS5WRFO6C475AOUZTWQLIARX/vendor-advisory
• lists.fedoraproject.orgFEDORA-2021-ffd0b2108dhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LMXX2POK5X576BSDWSXGU7EIK6I72ERU/vendor-advisory
• lists.fedoraproject.orgFEDORA-2021-03e61a6647https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BBPNGLQSYJHLZZ37BO42YY6S5OTIF4L4/vendor-advisory
• support.apple.comhttps://support.apple.com/kb/HT212320
• seclists.org20210427 APPLE-SA-2021-04-26-10 Xcode 12.5http://seclists.org/fulldisclosure/2021/Apr/60mailing-list
• security.gentoo.orgGLSA-202104-01https://security.gentoo.org/glsa/202104-01vendor-advisory
• packetstormsecurity.comhttp://packetstormsecurity.com/files/163978/Git-LFS-Clone-Command-Execution.html
• lists.debian.org[debian-lts-announce] 20221010 [SECURITY] [DLA 3145-1] git security updatehttps://lists.debian.org/debian-lts-announce/2022/10/msg00014.htmlmailing-list