CVE-2025-2934
MEDIUM 4.3 ALL-YEARSGitLab 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.
No known exploitation, public exploit, or elevated probability at this time. Track for changes.
Exploitation likelihood
0.5%chance of exploitation in 30 days · 45th percentile
Impact if exploited
4.3CVSS 3.1 · MEDIUM · CNA
- ConfidentialityNone
- IntegrityNone
- AvailabilityLow
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ⚠Privileges: Requires a low-privilege account
- ✓User interaction: No user interaction needed
- ✓Complexity: No special conditions — reliably repeatable
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
Search for new PoCs
Search GitHub now — results may be empty or unverified.
Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.
Data snapshot:
Weakness (CWE)
- CWE-770: : Allocation of Resources Without Limits or Throttling
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
References and research data (JSON)
Known Affected Software Configurations
| Vendor | Product | Version range |
|---|---|---|
| Gitlab | Gitlab | ≥ 5.2.0 and < 18.2.8 |
| Gitlab | Gitlab | ≥ 5.2.0 and < 18.2.8 |
| Gitlab | Gitlab | ≥ 18.3.0 and < 18.3.4 |
| Gitlab | Gitlab | ≥ 18.3.0 and < 18.3.4 |
| Gitlab | Gitlab | ≥ 18.4.0 and < 18.4.2 |
| Gitlab | Gitlab | ≥ 18.4.0 and < 18.4.2 |
All CVSS metrics
- MEDIUM 4.3 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L - MEDIUM 4.3 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L - MEDIUM 6.5 v3.1 · NVD Primary
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References
Exploit-tagged references (not proof of a PoC)
- https://hackerone.com/reports/3058791 CVE record · GitLab · Updated 2025-10-09T11:33:43.956Z
NVD · CVE-2025-2934 · Updated 2026-10-19T16:10:00.260
Advisories
- https://about.gitlab.com/releases/2025/10/08/patch-release-gitlab-18-4-2-released/ CVE record · GitLab · Updated 2025-10-09T11:33:43.956Z
NVD · CVE-2025-2934 · Updated 2026-10-19T16:10:00.260 - https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-33330 EUVD · EUVD-2025-33330
Technical & other
- https://gitlab.com/gitlab-org/gitlab/-/issues/528979 CVE record · GitLab · Updated 2025-10-09T11:33:43.956Z
NVD · CVE-2025-2934 · Updated 2026-10-19T16:10:00.260
Sources: NVD · CVE.org · All sources and attribution · EPSS