CVE-2021-22177

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-04-01 · updated 2026-06-17
Weakness: CWE-400

Description

Potential DoS was identified in gitlab-shell in GitLab CE/EE version 12.6.0 or above, which allows an attacker to spike the server resource utilization via gitlab-shell command.

Affected products

GitLab: from 12.6.0 before 13.6.7; from 13.7.0 before 13.7.7; from 13.8.0 before 13.8.4 — fixed in 13.6.7, 13.7.7, 13.8.4

How to fix

Upgrade to a fixed version: GitLab 13.6.7, 13.7.7, 13.8.4. Check the vendor advisory for mitigations.

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22177.json
https://gitlab.com/gitlab-org/gitlab/-/issues/238988
https://hackerone.com/reports/953444
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22177.json
https://gitlab.com/gitlab-org/gitlab/-/issues/238988
https://hackerone.com/reports/953444

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