CVE-2023-4378
MEDIUM 5.5 ALL-YEARSAn issue has been discovered in GitLab CE/EE affecting all versions starting from 11.8 before 16.1.5, all versions starting from 16.2 before 16.2.5, all versions starting from 16.3 before 16.3.1. A malicious Maintainer can, under specific circumstances, leak the sentry token by changing the configured URL in the Sentry error tracking settings page. This was as a result of an incomplete fix for CVE-2022-4365.
No known exploitation, public exploit, or elevated probability at this time. Track for changes.
Exploitation likelihood
0.5%chance of exploitation in 30 days · 43rd percentile
Impact if exploited
5.5CVSS 3.1 · MEDIUM · CNA
- ConfidentialityLow
- IntegrityLow
- AvailabilityNone
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ⚠Privileges: Requires an admin / high-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-201: : Insertion of Sensitive Information Into Sent Data
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
References and research data (JSON)
Known Affected Software Configurations
| Vendor | Product | Version range |
|---|---|---|
| Gitlab | Gitlab | ≥ 11.8.0 and < 16.1.5 |
| Gitlab | Gitlab | ≥ 11.8.0 and < 16.1.5 |
| Gitlab | Gitlab | ≥ 16.2 and < 16.2.5 |
| Gitlab | Gitlab | ≥ 16.2 and < 16.2.5 |
| Gitlab | Gitlab | 16.3.0 |
| Gitlab | Gitlab | 16.3.0 |
All CVSS metrics
- MEDIUM 5.5 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N - MEDIUM 5.5 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N - MEDIUM 4.3 v3.1 · NVD Primary
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
References
Exploit-tagged references (not proof of a PoC)
- https://hackerone.com/reports/2104591 CVE record · GitLab · Updated 2026-04-24T04:06:57.149Z
CVE record · CVE · Updated 2024-08-02T07:24:04.549Z
NVD · CVE-2023-4378 · Updated 2026-06-17T06:37:42.350
Advisories
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-54242 EUVD · EUVD-2023-54242
Technical & other
- https://gitlab.com/gitlab-org/gitlab/-/issues/422134 CVE record · GitLab · Updated 2026-04-24T04:06:57.149Z
CVE record · CVE · Updated 2024-08-02T07:24:04.549Z
NVD · CVE-2023-4378 · Updated 2026-06-17T06:37:42.350
Sources: NVD · CVE.org · All sources and attribution · EPSS