cve/2025/CVE-2025-25291.md

CVE-2025-25291

Description

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

Reference

• https://github.blog/security/sign-in-as-anyone-bypassing-saml-sso-authentication-with-parser-differentials

Github

• https://github.com/SAML-Toolkits/ruby-saml
• https://github.com/fkie-cad/nvd-json-data-feeds
• https://github.com/tanjiti/sec_profile
• https://github.com/w4zu/Debian_security