Home/CVE/ruby-saml provides security assertion markup language (SAML) single sign-on (SSO) for Ruby. An authentication bypass vul
CVE

CVE-2025-25292

ruby-saml provides security assertion markup language (SAML) single sign-on (SSO) for Ruby. An authentication bypass vul

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 contain a patch for the issue.

CRITICAL · CVSS 9.8 EPSS 0.03321
Act now
  • Public exploit or PoC is available
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-347Improper Verification of Cryptographic Signature
CWE-436Interpretation Conflict
▤

Affected Products & Versions

6
omniauth saml< 1.10.6
omniauth saml>= 2.0.0 and < 2.1.3
omniauth saml>= 2.2.0 and < 2.2.3
onelogin ruby-saml< 1.12.4
onelogin ruby-saml>= 1.13.0 and < 1.18.0
netapp storagegridall versions
▤

Affected Packages

2
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
RubyGems omniauth-saml CRITICAL fixed in 2.2.3
RubyGems ruby-saml CRITICAL fixed in 1.18.0
⚠

Public Exploits & PoCs

2
pocgithub.blog · sign-in-as-anyone-bypassing-saml-sso-authentication-with-...github.blog
pocportswigger.net · saml-roulette-the-hacker-always-winsportswigger.net
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD12 Mar 2025 · 09:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

2
usnUSN-7409-1
gitlab-securitypatch-release-gitlab-17-9-2-released
🔗

References & Sources

11
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://about.gitlab.com/releases/2025/03/12/patch-release-gitlab-17-9-2-releasedPatch
https://github.com/SAML-Toolkits/ruby-saml/commit/e76c5b36bac40aedbf1ba7ffaaf495be63328cd9Patch
https://github.com/SAML-Toolkits/ruby-saml/commit/e9c1cdbd0f9afa467b585de279db0cbd0fb8ae97Patch
https://github.com/SAML-Toolkits/ruby-saml/releases/tag/v1.12.4Release Notes
https://github.com/SAML-Toolkits/ruby-saml/releases/tag/v1.18.0Release Notes
https://github.com/SAML-Toolkits/ruby-saml/security/advisories/GHSA-754f-8gm6-c4r2Vendor Advisory
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