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

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

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

Published: December 9, 2025


Vulnerability identifier: #VU119404
CSH Severity: High
CVSS v4: 9.3 [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]
CVE-ID: CVE-2025-66568
CWE-ID: CWE-347
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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. 


Affected software

SAML SSO for Ruby
Aspera Enterprise WebApps

How to mitigate CVE-2025-66568

Install updates from vendor's website.

SAML SSO for Ruby - update to 1.18.0
Aspera Enterprise WebApps - update to 1.0.1

External References

Related Security Bulletins