CVE-2025-4439 | THREATINT

Description

An issue has been discovered in GitLab CE/EE affecting all versions from 15.10 before 18.0.5, 18.1 before 18.1.3, and 18.2 before 18.2.1 that could have allowed an authenticated user to perform cross-site scripting attacks when the instance is served through certain content delivery networks.

Reserved 2025-05-08 | Published 2025-07-23 | Updated 2025-07-23 | Assigner GitLab

HIGH: 7.7CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N

Problem types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Default status

unaffected

15.10 before 18.0.5

affected

18.1 before 18.1.3

affected

18.2 before 18.2.1

affected

Credits

Thanks [joaxcar](https://hackerone.com/joaxcar) for reporting this vulnerability through our HackerOne bug bounty program finder

References

gitlab.com/gitlab-org/gitlab/-/issues/541177 (GitLab Issue #541177) issue-tracking permissions-required

hackerone.com/reports/3120111 (HackerOne Bug Bounty Report #3120111) technical-description exploit permissions-required

cve.org (CVE-2025-4439)

nvd.nist.gov (CVE-2025-4439)

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