How severe is CVE-2025-25293?

CVE-2025-25293 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-25293 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-25293?

CVE-2025-25293 primarily affects Omniauth Omniauth Saml. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-25293?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-25293 have an EU (EUVD) identifier?

Yes. CVE-2025-25293 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-6413.

When was CVE-2025-25293 published?

CVE-2025-25293 was published on 2025-03-12 and last updated on 2026-06-17.

CVE-2025-25293

CVE-2025-25293 is a high-severity vulnerability in Omniauth Omniauth Saml with a CVSS 3.x base score of 7.5. 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: High (CVSS 3.x base score 7.5)
CVSS v4: 7.7
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-6413
Weakness: CWE-400
Affected product: Omniauth Omniauth Saml
Published: 2025-03-12
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2025-25293?: 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.
How severe is CVE-2025-25293?: CVE-2025-25293 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-25293 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-25293?: CVE-2025-25293 primarily affects Omniauth Omniauth Saml. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-25293?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-25293 have an EU (EUVD) identifier?: Yes. CVE-2025-25293 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-6413.
When was CVE-2025-25293 published?: CVE-2025-25293 was published on 2025-03-12 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:omniauth:omniauth_saml:*:*:*:*:*:ruby:*:*
cpe:2.3:a:onelogin:ruby-saml:*:*:*:*:*:*:*:*

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