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Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 5.2 prior to 18.2.8, 18.3 prior to 18.3.4, and 18.4 prior to 18.4.2 that could have allowed an authenticated attacker to create a denial of service condition by configuring malicious webhook endpoints that send crafted HTTP responses.

PUBLISHED Reserved 2025-03-28 | Published 2025-10-09 | Updated 2025-10-09 | Assigner GitLab




MEDIUM: 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Problem types

CWE-770: Allocation of Resources Without Limits or Throttling

Product status

Default status
unaffected

5.2 before 18.2.8
affected

18.3 before 18.3.4
affected

18.4 before 18.4.2
affected

Credits

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

References

about.gitlab.com/...08/patch-release-gitlab-18-4-2-released/

gitlab.com/gitlab-org/gitlab/-/issues/528979 (GitLab Issue #528979) issue-tracking permissions-required

hackerone.com/reports/3058791 (HackerOne Bug Bounty Report #3058791) technical-description exploit permissions-required

cve.org (CVE-2025-2934)

nvd.nist.gov (CVE-2025-2934)

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