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.
- Affected products
- Ruby-Saml
- Onelogin Ruby-saml
- < 1.18.0
- Fix
- Available
- CVSS 4.0
- 9.3 CRITICAL
- CVSS 3.1
- 9.1 CRITICAL
- EPSS
- 0.4% (33th percentile)
- Weakness
- CWE-347
- NVD status
- Analyzed
- Published
- 2025-12-09
CVE-2025-66567 at NVD
No indexed exploits for CVE-2025-66567 yet
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No exploit for CVE-2025-66567 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.