CVE-2025-6186
HIGH 8.7 ALL-YEARSAn issue has been discovered in GitLab CE/EE affecting all versions from 18.1 before 18.1.4, and 18.2 before 18.2.2 that could have allowed authenticated users to achieve account takeover by injecting malicious HTML into work item names.
Severe if exploited (CVSS 8.7), but no confirmed exploitation. Patch on a normal cadence.
Exploitation likelihood
0.3%chance of exploitation in 30 days · 25th percentile
Impact if exploited
8.7CVSS 3.1 · HIGH · CNA
- ConfidentialityHigh
- IntegrityHigh
- AvailabilityNone
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ⚠Privileges: Requires a low-privilege account
- ⚠User interaction: A user must take an action (click / open a file)
- ✓Complexity: No special conditions — reliably repeatable
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
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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-79: : Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
References and research data (JSON)
Known Affected Software Configurations
| Vendor | Product | Version range |
|---|---|---|
| Gitlab | Gitlab | ≥ 18.1.0 and < 18.1.4 |
| Gitlab | Gitlab | ≥ 18.1.0 and < 18.1.4 |
| Gitlab | Gitlab | ≥ 18.2.0 and < 18.2.2 |
| Gitlab | Gitlab | ≥ 18.2.0 and < 18.2.2 |
All CVSS metrics
- HIGH 8.7 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N - HIGH 8.7 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N - MEDIUM 5.4 v3.1 · NVD Primary
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
References
Exploit-tagged references (not proof of a PoC)
- https://hackerone.com/reports/3189522 CVE record · GitLab · Updated 2025-08-13T17:26:35.507Z
NVD · CVE-2025-6186 · Updated 2026-06-17T10:01:20.760
Advisories
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-24600 EUVD · EUVD-2025-24600
Technical & other
- https://gitlab.com/gitlab-org/gitlab/-/issues/549844 CVE record · GitLab · Updated 2025-08-13T17:26:35.507Z
NVD · CVE-2025-6186 · Updated 2026-06-17T10:01:20.760
Sources: NVD · CVE.org · All sources and attribution · EPSS