Name: CVE-2025-25291: Improper Verification of Cryptographic Signature
Creator: Rapid7
Published: 2025-03-12T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2025-25291, CVSS 9.8, EPSS 0.13848

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 and 1.18.0 due to a parser differential. ReXML and Nokogiri parse XML differently; the parsers can generate entirely different document structures from the same XML input. That allows an attacker to be able to execute a Signature Wrapping attack. This issue may lead to authentication bypass. Versions 1.12.4 and 1.18.0 fix the issue.

CVSS Details

CVSS 4.0 Base Score: 9.3 (CRITICAL)
CVSS 4.0 Vector: (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:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)
CVSS 3.1 Base Score: 9.8
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Debian	—	Upgrade ruby-saml	Apr 7, 2025	Mar 12, 2025
Freebsd	—	Upgrade gitlab-ceUpgrade gitlab-ee	Mar 15, 2025	Mar 13, 2025
Ubuntu	—	Upgrade ruby-samlUpgrade ruby-saml (Ubuntu Pro)	Apr 4, 2025	Mar 12, 2025

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CVSS Details

Covered by Rapid7

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