CVE-2021-39887

A stored Cross-Site Scripting vulnerability in the GitLab Flavored Markdown in GitLab CE/EE version 8.4 and above allowed an attacker to execute arbitrary JavaScript code on the victim's behalf.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.3 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
GitLabCNA
7.3 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
CVEADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 55%
VendorProductVersion
gitlabgitlab
8.4.0 ≤
𝑥
< 14.1.7
gitlabgitlab
8.4.0 ≤
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
Common Weakness Enumeration
References
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39887.json
https://gitlab.com/gitlab-org/gitlab/-/issues/332903
https://hackerone.com/reports/1218174
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39887.json
https://gitlab.com/gitlab-org/gitlab/-/issues/332903
https://hackerone.com/reports/1218174