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GitLab 16.11 < 18.1.6 / 18.2 < 18.2.6 / 18.3 < 18.3.2 (CVE-2025-6454)

high Nessus Plugin ID 264595

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Synopsis

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

Description

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

 - The vulnerability exists due to insufficient validation of user-supplied input in Webhook custom header. A remote user can send a specially crafted HTTP request and trick the application to initiate requests to arbitrary systems. (CVE-2025-6454)

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

Solution

Upgrade to GitLab version 18.1.6, 18.2.6, 18.3.2 or later.

See Also

http://www.nessus.org/u?5de73448

http://www.nessus.org/u?95111c59

https://gitlab.com/gitlab-org/gitlab/-/issues/550766

https://hackerone.com/reports/3162711

Plugin Details

Severity: High

ID: 264595

File Name: gitlab_cve-2025-6454.nasl

Version: 1.1

Type: combined

Agent: unix

Family: CGI abuses

Published: 9/12/2025

Updated: 9/12/2025

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.3

CVSS v2

Risk Factor: High

Base Score: 7.1

Temporal Score: 5.3

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

CVSS Score Source: CVE-2025-6454

CVSS v3

Risk Factor: High

Base Score: 8.5

Temporal Score: 7.4

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

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: 9/12/2025

Vulnerability Publication Date: 9/11/2025

Reference Information

CVE: CVE-2025-6454