CVE-2021-39896

In all versions of GitLab CE/EE since version 8.0, when an admin uses the impersonate feature twice and stops impersonating, the admin may be logged in as the second user they impersonated, which may lead to repudiation issues.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
3.8 LOW
NETWORK
LOW
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
GitLabCNA
3.8 LOW
NETWORK
LOW
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
CVEADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 42%
VendorProductVersion
gitlabgitlab
8.0.0 ≤
𝑥
< 14.1.7
gitlabgitlab
8.0.0 ≤
𝑥
< 14.1.7
gitlabgitlab
14.2 ≤
𝑥
< 14.2.5
gitlabgitlab
14.2 ≤
𝑥
< 14.2.5
gitlabgitlab
14.3 ≤
𝑥
< 14.3.1
gitlabgitlab
14.3 ≤
𝑥
< 14.3.1
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
gitlab
sid
16.8.4-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
gitlab
noble
dne
mantic
dne
lunar
dne
kinetic
dne
jammy
dne
impish
dne
hirsute
dne
focal
dne
bionic
dne
xenial
ignored
trusty
dne
References
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39896.json
https://gitlab.com/gitlab-org/gitlab/-/issues/339362
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39896.json
https://gitlab.com/gitlab-org/gitlab/-/issues/339362