CVE-2025-25291: GitLab – SAML Authentication Bypass

CVE-2025-25291: GitLab - SAML Authentication Bypass-渗透云记 - 专注于网络安全与技术分享
CVE-2025-25291: GitLab – SAML Authentication Bypass
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漏洞标题

CVE-2025-25291: Gitlab – SAML Authentication Bypass

漏洞描述

ruby-saml provides security assertion markup language (SAML) single sign-on (SSO) for Ruby. An authentication bypass vulnerability was found in ruby-saml prior to versions 1.12.4 and 1.18.0 due to a parser differential. ReXML and Nokogiri parse XML differently; the parsers can generate entirely different document structures from the same XML input. That allows an attacker to be able to execute a Signature Wrapping attack. This issue may lead to authentication bypass. Versions 1.12.4 and 1.18.0 fix the issue.

PoC代码

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