CVE-2025-12983

EUVD-2025-197698
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.9 before 18.3.6, 18.4 before 18.4.4, and 18.5 before 18.5.2 that could have allowed an authenticated attacker to cause a denial of service condition by submitting specially crafted markdown content with nested formatting patterns.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
3.5 LOW
NETWORK
HIGH
LOW
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 29%
Affected Products (NVD)
VendorProductVersion
gitlabgitlab
16.9.0 ≤
𝑥
< 18.3.6
gitlabgitlab
16.9.0 ≤
𝑥
< 18.3.6
gitlabgitlab
18.4.0 ≤
𝑥
< 18.4.4
gitlabgitlab
18.4.0 ≤
𝑥
< 18.4.4
gitlabgitlab
18.5.0 ≤
𝑥
< 18.5.2
gitlabgitlab
18.5.0 ≤
𝑥
< 18.5.2
𝑥
= Vulnerable software versions
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
gitlab
jammy
dne
noble
dne
plucky
dne
questing
dne
xenial
ignored
Common Weakness Enumeration
References
https://about.gitlab.com/releases/2025/11/12/patch-release-gitlab-18-5-2-released/
https://gitlab.com/gitlab-org/gitlab/-/issues/296257
https://hackerone.com/reports/3419588