CVE-2023-5356

Public Exploit
Incorrect Authorization in GitLab

Description

Incorrect authorization checks in GitLab CE/EE from all versions starting from 8.13 before 16.5.6, all versions starting from 16.6 before 16.6.4, all versions starting from 16.7 before 16.7.2, allows a user to abuse slack/mattermost integrations to execute slash commands as another user.

Remediation

Solution:

  • Upgrade to versions 16.7.2, 16.6.4, 16.5.6 or above.

Category

7.3
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.02%
Affected: GitLab GitLab
Published at:
Updated at:

References

Link Tags
https://gitlab.com/gitlab-org/gitlab/-/issues/427154 issue tracking broken link
https://hackerone.com/reports/2188868 broken link exploit permissions required technical description

Frequently Asked Questions

What is the severity of CVE-2023-5356?
CVE-2023-5356 has been scored as a high severity vulnerability.
How to fix CVE-2023-5356?
To fix CVE-2023-5356: Upgrade to versions 16.7.2, 16.6.4, 16.5.6 or above.
Is CVE-2023-5356 being actively exploited in the wild?
It is possible that CVE-2023-5356 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-5356?
CVE-2023-5356 affects GitLab GitLab.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.