CVE-2025-2256

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

12/09/2025

Last modified:

20/09/2025

Description

An issue has been discovered in GitLab CE/EE affecting all versions from 7.12 before 18.1.6, 18.2 before 18.2.6, and 18.3 before 18.3.2 that could have allowed unauthorized users to render the GitLab instance unresponsive to legitimate users by sending multiple concurrent large SAML responses.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

7.50

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:gitlab:gitlab:::::community:::*	7.12.0 (including)	18.1.6 (excluding)
cpe:2.3:a:gitlab:gitlab:::::enterprise:::*	7.12.0 (including)	18.1.6 (excluding)
cpe:2.3:a:gitlab:gitlab:::::community:::*	18.2.0 (including)	18.2.6 (excluding)
cpe:2.3:a:gitlab:gitlab:::::enterprise:::*	18.2.0 (including)	18.2.6 (excluding)
cpe:2.3:a:gitlab:gitlab:::::community:::*	18.3.0 (including)	18.3.2 (excluding)
cpe:2.3:a:gitlab:gitlab:::::enterprise:::*	18.3.0 (including)	18.3.2 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2025-2256

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools