How severe is CVE-2025-54572?

CVE-2025-54572 has a CVSS 4.0 base score of 6.9, rated medium severity.

Is CVE-2025-54572 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-54572?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-54572 have an EU (EUVD) identifier?

Yes. CVE-2025-54572 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23157.

When was CVE-2025-54572 published?

CVE-2025-54572 was published on 2025-07-30 and last updated on 2026-06-17.

CVE-2025-54572

CVE-2025-54572 is a medium-severity vulnerability with a CVSS 4.0 base score of 6.9. 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-400.

Key facts

Severity: Medium (CVSS 4.0 base score 6.9)
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-23157
Weakness: CWE-400
Published: 2025-07-30
Last modified: 2026-06-17

Description

The Ruby SAML library is for implementing the client side of a SAML authorization. In versions 1.18.0 and below, a denial-of-service vulnerability exists in ruby-saml even with the message_max_bytesize setting configured. The vulnerability occurs because the SAML response is validated for Base64 format prior to checking the message size, leading to potential resource exhaustion. This is fixed in version 1.18.1.

Frequently asked questions

What is CVE-2025-54572?: The Ruby SAML library is for implementing the client side of a SAML authorization. In versions 1.18.0 and below, a denial-of-service vulnerability exists in ruby-saml even with the message_max_bytesize setting configured. The vulnerability occurs because the SAML response is validated for Base64 format prior to checking the message size, leading to potential resource exhaustion. This is fixed in version 1.18.1.
How severe is CVE-2025-54572?: CVE-2025-54572 has a CVSS 4.0 base score of 6.9, rated medium severity.
Is CVE-2025-54572 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-54572?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-54572 have an EU (EUVD) identifier?: Yes. CVE-2025-54572 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23157.
When was CVE-2025-54572 published?: CVE-2025-54572 was published on 2025-07-30 and last updated on 2026-06-17.

References

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