CVE-2021-22175: GitLab Server-Side Request Forgery (SSRF) Vulnerability

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: yes — in CISA KEV since 2026-02-18
EPSS: 53.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-06-11 · updated 2026-10-01
Weakness: CWE-918

Description

When requests to the internal network for webhooks are enabled, a server-side request forgery vulnerability in GitLab affecting all versions starting from 10.5 was possible to exploit for an unauthenticated attacker even on a GitLab instance where registration is disabled

Affected products

GitLab: from 10.5.0 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-2021-22175.json
https://gitlab.com/gitlab-org/gitlab/-/issues/294178
https://hackerone.com/reports/1059596
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22175.json
https://gitlab.com/gitlab-org/gitlab/-/issues/294178
https://hackerone.com/reports/1059596
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22175

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