Vulnerability identifier: #VU84418

Vulnerability risk: Medium

CVSSv3.1: 4.2 [CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-5512

CWE-ID: CWE-254

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Gitlab Community Edition
Universal components / Libraries / Software for developers
GitLab Enterprise Edition
Universal components / Libraries / Software for developers

Vendor: GitLab, Inc

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to the omission of double encoding in file names which facilitates the creation of repositories with malicious content. A remote user can use specific HTML encoding for file names leading for incorrect representation in the UI.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Gitlab Community Edition: 16.3.0 - 16.6.1

GitLab Enterprise Edition: 16.3.0 - 16.6.1

---

External links
http://about.gitlab.com/releases/2023/12/13/security-release-gitlab-16-6-2-released/

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.