GitLab 16.5 < 16.5.3 / 16.6 < 16.6.1 (CVE-2023-6396)

high Nessus Plugin ID 186659


The version of GitLab installed on the remote host is affected by a vulnerability.


The version of GitLab installed on the remote host is affected by a vulnerability, as follows:

- Gitlab reports: XSS and ReDoS in Markdown via Banzai pipeline of Jira Members with admin_group_member custom permission can add members with higher role Release Description visible in public projects despite release set as project members only through atom response Manipulate the repository content in the UI (CVE-2023-3401 bypass) External user can abuse policy bot to gain access to internal projects Client-side DOS via Mermaid Flowchart Developers can update pipeline schedules to use protected branches even if they don't have permission to merge Users can install Composer packages from public projects even when Package registry is turned off Unauthorized member can gain Allowed to push and merge access and affect integrity of protected branches Guest users can react (emojis) on confidential work items which they cant see in a project (CVE-2023-6396)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.


Upgrade to GitLab version 16.5.3, 16.6.1 or later.

See Also

Plugin Details

Severity: High

ID: 186659

File Name: gitlab_cve-2023-6396.nasl

Version: 1.2

Type: combined

Agent: unix

Family: CGI abuses

Published: 12/7/2023

Updated: 12/22/2023

Configuration: Enable thorough checks

Supported Sensors: Nessus Agent, Nessus

Risk Information


Risk Factor: Medium

Score: 5.2


Risk Factor: High

Base Score: 8.5

Temporal Score: 6.3

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:N

CVSS Score Source: CVE-2023-6396


Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:gitlab:gitlab

Required KB Items: installed_sw/GitLab

Exploit Ease: No known exploits are available

Patch Publication Date: 11/30/2023

Vulnerability Publication Date: 11/30/2023

Reference Information

CVE: CVE-2023-6396

IAVA: 2023-A-0666-S