Under very specific conditions a user could be impersonated using Gitlab shell.

published 2021-08-20 5 y ago modified 2026-09-08 2 mo ago also BIT-gitlab-2021-22254 , EUVD-2021-9400

cvss: 3.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits: 0; none known

Under very specific conditions a user could be impersonated using Gitlab shell. This vulnerability affects GitLab CE/EE 13.1 and later through 14.1.2, 14.0.7 and 13.12.9.

Patch / fix

fixed in 3

bitnami gitlab 13.12.9, 14.0.7, 14.1.2
gitlab gitlab 13.12.9, 14.0.7, 14.1.2
gitlab gitlab_enterprise 13.12.9, 14.0.7, 14.1.2

Exploit prediction

0.87% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	3.1	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
NVD	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
NVD	2.0	3.5	AV:N/AC:M/Au:S/C:P/I:N/A:N
OSV	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
bitnami	gitlab	>=13.1.0, <13.12.9 >=14.0.0, <14.0.7 >=14.1.0, <14.1.2	13.12.9 14.0.7 14.1.2

Affected products

GitLab GitLab

Classification

Weakness

CWE-116 Improper Encoding or Escaping of Output

Technology feeds

GitLab rss critical rss

References

gitlab.com /gitlab-org/cves/-/blob/master/2021/CVE-2021-22254.json
vendor-advisory, advisory
gitlab.com /gitlab-org/gitlab/-/issues/300265
broken-link, web
hackerone.com /reports/1087806
permissions-required, third-party-advisory, advisory
nvd.nist.gov /vuln/detail/CVE-2021-22254
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Enhance with deb and rpm package type records.

Summary