#VU119404 Improper verification of cryptographic signature in SAML SSO for Ruby - CVE-2025-66568

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU119404

#VU119404 Improper verification of cryptographic signature in SAML SSO for Ruby - CVE-2025-66568

Published: December 9, 2025


Vulnerability identifier: #VU119404
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2025-66568
CWE-ID: CWE-347
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
SAML SSO for Ruby
Software vendor:
SAML-Toolkits

Description

The vulnerability allows a remote attacker to bypass authentication. 

The vulnerability exists due to a libxml2 canonicalization error when handling invalid XML input. A remote attacker can supply specially crafted XML data to the application and execute a Signature Wrapping attack, leading to authentication bypass. 


Remediation

Install updates from vendor's website.

External links