CVE detail
CVE-2025-66567
The ruby-saml library is for implementing the client side of a SAML authorization. ruby-saml versions up to and including 1.12.4 contain an authentication bypass vulnerability due to an incomplete fix for CVE-2025-25292. ReXML and Nokogiri parse XML differently, generating entirely different document structures from the same input. This allows an attacker to execute a Signature Wrapping attack. This issue is fixed in version 1.18.0.
Buzz score
Why this CVE is surfacing
This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.
Buzz score components · mention 6.9 · diversity 5.0 · KEV 0.0 · OTX 0.0 · PoC 0.0
Why it matters now
Mention timeline
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Evidence
Source links by recency
1 source links · newest first
Researchers have uncovered fresh techniques for breaking SAML-based authentication, further undermining the security assurances offered by the aging by still widely used authentication protocol. SAML (Security Assertion Markup Language) has been the backbone of enterprise single sign-on (SSO) technologies for more than 20 years. During a presentation at the Black Hat Europe conference on Wednesday, […]
newswww.csoonline.comDec 11, 2025, 7:29 PM
Exploit code
Public exploit repository references
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0 repository references · best confidence N/A · max 0 stars
Related records
Similar CVEs
6 related CVEs with shared weakness or product evidence
- CVE-2025-66568CVSS 9.3 · Critical
The ruby-saml library implements the client side of an SAML authorization. Versions up to and including 1.12.4, are vulnerable to authentication bypass through the libxml2 canonic…
- CVE-2025-25292CVSS 9.3 · Critical
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…
- CVE-2025-25291CVSS 9.3 · Critical
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…
- CVE-2024-45409CVSS 10.0 · Critical
The Ruby SAML library is for implementing the client side of a SAML authorization. Ruby-SAML in <= 12.2 and 1.13.0 <= 1.16.0 does not properly verify the signature of the SAML Res…
- CVE-2026-65616CVSS 8.8 · High
Incorrect authorization validation in refresh token signature allows non-admin users to obtain a signed JFrog administrator token.
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