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    CVE-2025-25291

    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.

    Published:Mar 12, 2025
    Last Modified:Nov 3, 2025
    EPS:Mar 12, 2025
    EPSS Score:0.17932
    CVSS Score:9.8

    Affected Products

    Vendor
    Netapp
    Product
    Storagegrid
    Vendor
    Omniauth
    Product
    Omniauth Saml
    Vendor
    Onelogin
    Product
    Ruby-saml

    Exploits

    https://github.blog/security/sign-in-as-anyone-bypassing-saml-sso-authentication-with-parser-differentialshttps://portswigger.net/research/saml-roulette-the-hacker-always-wins

    Related CVEs

    CVE-2026-22056 (CVSS 2.3) — StorageGRID (formerly StorageGRID Webscale) versions 11.5 and higher in a non-standard configuration and scena…
    CVE-2026-22051 (CVSS 2.3) — StorageGRID (formerly StorageGRID Webscale) versions prior to 11.9.0.13 and 12.0.0.6 are susceptible to a Info…
    CVE-2026-22048 (CVSS 7.1) — StorageGRID (formerly StorageGRID Webscale) versions prior to 11.9.0.12 and 12.0.0.4 with Single Sign-on enabl…
    CVE-2025-26517 (CVSS 5.4) — StorageGRID (formerly StorageGRID Webscale) versions prior to 11.8.0.15 and 11.9.0.8 are susceptible to a pr…
    CVE-2025-26516 (CVSS 5.3) — StorageGRID (formerly StorageGRID Webscale) versions prior to 11.8.0.15 and 11.9.0.8 are susceptible to a De…
    CVE-2025-26515 (CVSS 7.5) — StorageGRID (formerly StorageGRID Webscale) versions prior to 11.8.0.15 and 11.9.0.8 without Single Sign-on …
    CVE-2025-26514 (CVSS 6.4) — StorageGRID (formerly StorageGRID Webscale) versions prior to 11.8.0.15 and 11.9.0.8 are susceptible to a Re…
    CVE-2025-25292 (CVSS 9.3) — ruby-saml provides security assertion markup language (SAML) single sign-on (SSO) for Ruby. An authentication …
    CVE-2024-21994 (CVSS 4.3) — StorageGRID (formerly StorageGRID Webscale) versions prior to 11.9 are susceptible to a Denial of Service (DoS…
    CVE-2024-21988 (CVSS 5.3) — StorageGRID (formerly StorageGRID Webscale) versions prior to 11.7.0.9 and 11.8.0.5 are susceptible to disclo…

    References

    https://about.gitlab.com/releases/2025/03/12/patch-release-gitlab-17-9-2-released
    https://github.blog/security/sign-in-as-anyone-bypassing-saml-sso-authentication-with-parser-differentials
    https://github.com/SAML-Toolkits/ruby-saml/commit/e76c5b36bac40aedbf1ba7ffaaf495be63328cd9
    https://github.com/SAML-Toolkits/ruby-saml/commit/e9c1cdbd0f9afa467b585de279db0cbd0fb8ae97
    https://github.com/SAML-Toolkits/ruby-saml/releases/tag/v1.12.4
    https://github.com/SAML-Toolkits/ruby-saml/releases/tag/v1.18.0
    https://github.com/SAML-Toolkits/ruby-saml/security/advisories/GHSA-4vc4-m8qh-g8jm
    https://github.com/omniauth/omniauth-saml/security/advisories/GHSA-hw46-3hmr-x9xv
    https://portswigger.net/research/saml-roulette-the-hacker-always-wins
    https://securitylab.github.com/advisories/GHSL-2024-329_GHSL-2024-330_ruby-saml
    https://lists.debian.org/debian-lts-announce/2025/04/msg00011.html
    https://news.ycombinator.com/item?id=43374519
    https://security.netapp.com/advisory/ntap-20250314-0010/

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High