CVE-2025-2256
Last modified
CVE-2025-2256 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 0.47% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Gitlab | Gitlab | >= 7.12.0, < 18.1.6 |
| Gitlab | Gitlab | >= 18.2.0, < 18.2.6 |
| Gitlab | Gitlab | >= 18.3.0, < 18.3.2 |
References
- https://about.gitlab.com/releases/2025/09/10/patch-release-gitlab-18-3-2-released/Release Notes, Vendor Advisory
- https://hackerone.com/reports/3019485Permissions Required
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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