Vulnerability · Published Jul 28, 2025 · Assigned by GitHub_M
CVE-2025-54419Node-SAML Contains SAML Signature Verification Vulnerability
Critical 10.0
In plain English
A critical-severity improper authentication in node-saml from node-saml. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
A SAML library not dependent on any frameworks that runs in Node. In version 5.0.1, 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. To conduct the attack an attacker would need a validly signed document from the identity provider (IdP). This is fixed in version 5.1.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | @node-saml/node-saml | 5.1.0 | GHSA-4mxg-3p6v-xgq3 |
| npm | @node-saml/passport-saml | 5.1.0 | GHSA-4mxg-3p6v-xgq3 |
| npm | passport-saml | no fix listed | GHSA-4mxg-3p6v-xgq3 |
Affected products (as reported)
Weakness: CWE-287, CWE-347 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N