CVE-2023-5512

MEDIUM 4.8

Improper Control of Generation of Code ('Code Injection') in GitLab

CVSS Score

4.8

EPSS Score

0.3%

EPSS Percentile

53th

An issue has been discovered in GitLab CE/EE affecting all versions from 16.3 before 16.4.4, all versions starting from 16.5 before 16.5.4, all versions starting from 16.6 before 16.6.2. File integrity may be compromised when specific HTML encoding is used for file names leading for incorrect representation in the UI.

CWE	CWE-94
Vendor	gitlab
Product	gitlab
Ecosystems	DevTools
Industries	Technology
Published	Dec 15, 2023
Last Updated	Apr 28, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Affected Versions

GitLab / GitLab

16.3 < 16.4.4 16.5 < 16.5.4 16.6 < 16.6.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

gitlab.com: https://gitlab.com/gitlab-org/gitlab/-/issues/427827 hackerone.com: https://hackerone.com/reports/2194607

Credits

Thanks [st4nly0n](https://hackerone.com/st4nly0n) for reporting this vulnerability through our HackerOne bug bounty program