{"id":86970,"date":"2026-04-23T01:00:54","date_gmt":"2026-04-23T01:00:54","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-30T06:00:00","slug":"cve-2025-2256-unauthorized-saml-response-exploit-in-gitlab","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-2256-unauthorized-saml-response-exploit-in-gitlab\/","title":{"rendered":"CVE-2025-2256: Unauthorized SAML Response Exploit in GitLab<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

The vulnerability identified as CVE-2025-2256 is a serious security flaw found in various versions of GitLab CE\/EE. The issue lies in the handling of Security Assertion Markup Language (SAML) responses. An attacker, without necessary authorization, could potentially send multiple concurrent large SAML responses, rendering the GitLab instance unresponsive to legitimate users. This vulnerability matters as it can lead to a potential system compromise or data leakage.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-2256
\nSeverity: High (7.5 CVSS score)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: System compromise or data leakage<\/p>\n

Affected Products<\/strong><\/p>

\r\n

\r\n \r\n \"Ameeba\r\n <\/a>\r\n A new way to communicate\r\n <\/h2>\r\n\r\n

\r\n Ameeba Chat is built on encrypted identity, not personal profiles.\r\n <\/p>\r\n\r\n

\r\n Message, call, share files, and coordinate with identities kept separate.\r\n <\/p>\r\n\r\n