CVE-2025-54369: Signature Bypass

Description

Node-SAML is a SAML library not dependent on any frameworks that runs in Node. In versions 5.0.1 and below, Node-SAML loads the assertion from the (unsigned) original response document. This is different than the parts that are verified when checking signature. This allows an attacker to modify authentication details within a valid SAML assertion. For example, in one attack it is possible to remove any character from the SAML assertion username. This issue is fixed in version 5.1.0.

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Weakness Type (CWE)

CWE-87 CWE-87

CWE-347 CWE-347

References

Other References

https://github.com/node-saml/node-saml/commit/31ead9411ebc3e2385086fa9149b6c17732bca10 https://github.com/node-saml/node-saml/releases/tag/v5.1.0 https://github.com/node-saml/node-saml/security/advisories/GHSA-m837-g268-mmv7

Frequently Asked Questions

What is CVE-2025-54369? +

Node-SAML is a SAML library not dependent on any frameworks that runs in Node. In versions 5.0.1 and below, Node-SAML loads the assertion from the (unsigned) original response document. This is different than the parts that are verified when checking signature. This allows an attacker to modify authentication details within a valid SAML assertion. For example, in one attack it is possible to remove any character from the SAML assertion username. This issue is fixed in version 5.1.0.

How do I check if I'm vulnerable to CVE-2025-54369? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2025-54369