CVE-2025-54369
CVE-2025-54369 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-87.
Key facts
- Severity: Critical (CVSS 4.0 base score 9.3)
- EPSS exploit prediction: 0% (33rd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-22555
- Weakness: CWE-87
- Published:
- Last modified:
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.
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 severe is CVE-2025-54369?
- CVE-2025-54369 has a CVSS 4.0 base score of 9.3, rated critical severity.
- Is CVE-2025-54369 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2025-54369?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2025-54369 have an EU (EUVD) identifier?
- Yes. CVE-2025-54369 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-22555.
- When was CVE-2025-54369 published?
- CVE-2025-54369 was published on 2025-07-24 and last updated on 2026-06-17.
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
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