critical
CVE-2025-25291
ruby-saml provides security assertion markup language (SAML) single si ...
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.
Severity by source
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GHSA9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Bitnami9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Trivy's own label is CRITICAL. Rated critical by NVD, GHSA, Bitnami, Ruby Advisory DB. Rated lower by Ubuntu (medium).
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.
Affected packages and fixed versions
| Source | Package | Fixed in |
|---|---|---|
| bitnami::Bitnami Vulnerability Database | gitlab | 17.9.2 |
| rubygems::GitHub Security Advisory RubyGems | ruby-saml | 1.12.4, 1.18.0 |
| rubygems::Ruby Advisory Database | ruby-saml | ~> 1.12.4, >= 1.18.0 |
| debian 11 | ruby-saml | 1.11.0-1+deb11u2 |
| debian 12 | ruby-saml | no fix listed |
| echo | ruby-saml | no fix listed |
| rapidfort debian 12 | ruby-saml | 0:1.17.0-1 |
| rapidfort debian 13 | ruby-saml | 0:1.17.0-1 |
| rapidfort ubuntu 20.04 | ruby-saml | 0:1.15.0-1ubuntu0.24.10.2 |
| rapidfort ubuntu 22.04 | ruby-saml | 0:1.15.0-1ubuntu0.24.10.2 |
| rapidfort ubuntu 24.04 | ruby-saml | 0:1.15.0-1ubuntu0.24.10.2 |
| ubuntu 18.04-ESM | ruby-saml | 1.7.2-1ubuntu0.1~esm2 |
Show all 16 entries from 16 sources
| Source | Package | Fixed in |
|---|---|---|
| bitnami::Bitnami Vulnerability Database | gitlab | 17.9.2 |
| rubygems::GitHub Security Advisory RubyGems | ruby-saml | 1.12.4, 1.18.0 |
| rubygems::Ruby Advisory Database | ruby-saml | ~> 1.12.4, >= 1.18.0 |
| debian 11 | ruby-saml | 1.11.0-1+deb11u2 |
| debian 12 | ruby-saml | no fix listed |
| echo | ruby-saml | no fix listed |
| rapidfort debian 12 | ruby-saml | 0:1.17.0-1 |
| rapidfort debian 13 | ruby-saml | 0:1.17.0-1 |
| rapidfort ubuntu 20.04 | ruby-saml | 0:1.15.0-1ubuntu0.24.10.2 |
| rapidfort ubuntu 22.04 | ruby-saml | 0:1.15.0-1ubuntu0.24.10.2 |
| rapidfort ubuntu 24.04 | ruby-saml | 0:1.15.0-1ubuntu0.24.10.2 |
| ubuntu 18.04-ESM | ruby-saml | 1.7.2-1ubuntu0.1~esm2 |
| ubuntu 20.04-ESM | ruby-saml | 1.11.0-1ubuntu0.1+esm1 |
| ubuntu 22.04 | ruby-saml | no fix listed |
| ubuntu 24.04 | ruby-saml | no fix listed |
| ubuntu 24.10 | ruby-saml | 1.15.0-1ubuntu0.24.10.2 |
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
- 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
All 20 references
- https://github.com/advisories/GHSA-4vc4-m8qh-g8jm
- https://github.com/omniauth/omniauth-saml/security/advisories/GHSA-hw46-3hmr-x9xv
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/ruby-saml/CVE-2025-25291.yml
- https://lists.debian.org/debian-lts-announce/2025/04/msg00011.html
- https://news.ycombinator.com/item?id=43374519
- https://nvd.nist.gov/vuln/detail/CVE-2025-25291
- https://portswigger.net/research/saml-roulette-the-hacker-always-wins
- https://security.netapp.com/advisory/ntap-20250314-0010
- https://security.netapp.com/advisory/ntap-20250314-0010/
- https://securitylab.github.com/advisories/GHSL-2024-329_GHSL-2024-330_ruby-saml
- https://ubuntu.com/security/notices/USN-7409-1
- https://www.cve.org/CVERecord?id=CVE-2025-25291