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.

Reserved 2025-02-06 | Published 2025-03-12 | Updated 2025-03-15 | Assigner GitHub_M

Problem types

CWE-347: Improper Verification of Cryptographic Signature

CWE-436: Interpretation Conflict

Product status

< 1.12.4
affected

>= 1.13.0, < 1.18.0
affected

References

github.com/...y-saml/security/advisories/GHSA-4vc4-m8qh-g8jm

github.com/...h-saml/security/advisories/GHSA-hw46-3hmr-x9xv

github.com/...ommit/e76c5b36bac40aedbf1ba7ffaaf495be63328cd9

github.com/...ommit/e9c1cdbd0f9afa467b585de279db0cbd0fb8ae97

about.gitlab.com/.../12/patch-release-gitlab-17-9-2-released

github.blog/...-sso-authentication-with-parser-differentials

github.com/SAML-Toolkits/ruby-saml/releases/tag/v1.12.4

github.com/SAML-Toolkits/ruby-saml/releases/tag/v1.18.0

cve.org (CVE-2025-25291)

nvd.nist.gov (CVE-2025-25291)

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