CVE-2025-2256CWE-1284

CVE-2025-2256

High · published September 12, 2025

CVSS v3.1
7.5
EPSS
1%
Percentile
43.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00528 · 43.9th percentile
Weakness
CWE-1284 · Improper Validation of Specified Quantity in Input
Published
2025-09-12T10:15Z
Affected products (6)
ProductVersionsFixed in
gitlab/gitlab≥ 7.12.0, < 18.1.618.1.6
gitlab/gitlab≥ 7.12.0, < 18.1.618.1.6
gitlab/gitlab≥ 18.2.0, < 18.2.618.2.6
gitlab/gitlab≥ 18.2.0, < 18.2.618.2.6
gitlab/gitlab≥ 18.3.0, < 18.3.218.3.2
gitlab/gitlab≥ 18.3.0, < 18.3.218.3.2
References (3)
https://about.gitlab.com/releases/2025/09/10/patch-release-gitlab-18-3-2-released/ · [email protected]https://gitlab.com/gitlab-org/gitlab/-/issues/524633 · [email protected]https://hackerone.com/reports/3019485 · [email protected]
EPSS history
Timeline
  • 12 SEP 06:06Z
    Improper Validation of Specified Quantity in Input in GitLab
    cvelistv5