Summaryinfo

A vulnerability identified as critical has been detected in SAML-Toolkits ruby-saml up to 1.17.x. This vulnerability affects unknown code of the component Incomplete Fix CVE-2025-25292. The manipulation leads to signature verification. This vulnerability is documented as CVE-2025-66567. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in SAML-Toolkits ruby-saml up to 1.17.x and classified as critical. This issue affects some unknown functionality of the component Incomplete Fix CVE-2025-25292. The manipulation with an unknown input leads to a signature verification vulnerability. Using CWE to declare the problem leads to CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2025-66567 since 12/04/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 278369 (Linux Distros Unpatched Vulnerability : CVE-2025-66567), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.18.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (278369). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Programming Language Software

Vendor

• SAML-Toolkits

Name

• ruby-saml

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17

Website

• Product: https://github.com/SAML-Toolkits/ruby-saml/

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