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CVE-2024-45409

The Ruby SAML library vulnerable to a SAML authentication bypass via Incorrect XPath selector

The Ruby SAML library is for implementing the client side of a SAML authorization. Ruby-SAML in <= 12.2 and 1.13.0 <= 1.16.0 does not properly verify the signature of the SAML Response. An unauthenticated attacker with access to any signed saml document (by the IdP) can thus forge a SAML Response/Assertion with arbitrary contents. This would allow the attacker to log in as arbitrary user within the vulnerable system. This vulnerability is fixed in 1.17.0 and 1.12.3.

CVSS 3.1 · 10 Critical EPSS 12.5% KEV · Not listed
Vendors
Gitlab Omniauth Onelogin
Products
Gitlab Omniauth-saml Omniauth Saml and 1 more
CVE-2025-25293

ruby-saml vulnerable to Remote Denial of Service (DoS) with compressed SAML responses

ruby-saml provides security assertion markup language (SAML) single sign-on (SSO) for Ruby. Prior to versions 1.12.4 and 1.18.0, ruby-saml is susceptible to remote Denial of Service (DoS) with compressed SAML responses. ruby-saml uses zlib to decompress SAML responses in case they're compressed. It is possible to bypass the message size check with a compressed assertion since the message size is checked before inflation and not after. This issue may lead to remote Denial of Service (DoS). Versions 1.12.4 and 1.18.0 fix the issue.

CVSS 4.0 · 7.7 High EPSS 1.5% KEV · Not listed
Vendors
Omniauth Onelogin
Products
Omniauth Saml Ruby-saml
CVE-2025-25292

Ruby SAML vulnerable to SAML authentication bypass due to namespace handling (parser differential)

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 contain a patch for the issue.

CVSS 4.0 · 9.3 Critical EPSS 65.1% KEV · Not listed
Vendors
Netapp Omniauth Onelogin
Products
Storagegrid Omniauth Saml Ruby-saml
CVE-2025-25291

ruby-saml vulnerable to SAML authentication bypass due to DOCTYPE handling (parser differential)

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 4.0 · 9.3 Critical EPSS 21.0% KEV · Not listed
Vendors
Netapp Omniauth Onelogin
Products
Storagegrid Omniauth Saml Ruby-saml
CVE-2017-11430

Multiple SAML libraries may allow authentication bypass via incorrect XML canonicalization and DOM traversal

OmniAuth OmnitAuth-SAML 1.9.0 and earlier may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a way that an attacker may be able to manipulate the SAML data without invalidating the cryptographic signature, allowing the attack to potentially bypass authentication to SAML service providers.

CVSS 3.0 · 7.7 High EPSS 2.4% KEV · Not listed
Vendors
Omniauth
Products
Omniauth Saml