CVE-2025-2256 is a denial-of-service vulnerability affecting GitLab CE/EE versions 7.12 through 18.1.5, 18.2 through 18.2.5, and 18.3 through 18.3.1. Unauthorized users can exploit this by sending multiple concurrent large SAML responses, rendering the GitLab instance unresponsive. With a CVSS score of 7.5 (High), this vulnerability has a network attack vector, low attack complexity, and high impact on availability, with no impact on confidentiality or integrity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or KEV listing. Community discussion and media coverage are minimal, with only one mention and one article identified.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 7.12.0, < 18.1.6CPE matchmatch criteria | cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* | ||
>= 7.12.0, < 18.1.6CPE matchmatch criteria | cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* | ||
>= 18.2.0, < 18.2.6CPE matchmatch criteria | cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* | ||
>= 18.2.0, < 18.2.6CPE matchmatch criteria | cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* | ||
>= 18.3.0, < 18.3.2CPE matchmatch criteria | cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.