CVE-2023-5356

HIGH

GitLab 8.13-16.5.5, 16.6-16.6.3, 16.7-16.7.1 - Incorrect Authorization via Slack/Mattermost Integration

Title source: llm
STIX 2.1

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.

References (2)

Core 2
Core References
Broken Link issue-tracking permissions-required
https://gitlab.com/gitlab-org/gitlab/-/issues/427154
Permissions Required technical-description exploit permissions-required
https://hackerone.com/reports/2188868

Scores

CVSS v3 7.3
EPSS 0.0007
EPSS Percentile 20.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-863
Status published
Products (6)
gitlab/gitlab 16.7.0 (2 CPE variants)
gitlab/gitlab 16.7.1 (2 CPE variants)
GitLab/GitLab 16.6 - 16.6.4
GitLab/GitLab 16.7 - 16.7.2
GitLab/GitLab 8.13 - 16.5.6
gitlab/gitlab 8.13.0 - 16.5.6 (2 CPE variants)
Published Jan 12, 2024
Tracked Since Feb 18, 2026