CVE-2025-25293

Name: CVE-2025-25293
Creator: NVD / NIST
Published: 2025-03-12T21:15:42.363+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.7/10EPSS 1.36%

Last modified Jun 17, 2026

CVE-2025-25293 is a high-severity vulnerability rated 7.7/10 on the CVSS scale. 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. EPSS estimates a 1.36% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS 4.0

7.7/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

1.36%

68.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
Omniauth	Omniauth Saml	< 1.10.6
Omniauth	Omniauth Saml	>= 2.0.0, < 2.1.3
Omniauth	Omniauth Saml	>= 2.2.0, < 2.2.3
Onelogin	Ruby-Saml	< 1.12.4
Onelogin	Ruby-Saml	>= 1.13.0, < 1.18.0

References

https://about.gitlab.com/releases/2025/03/12/patch-release-gitlab-17-9-2-releasedPatch
https://github.blog/security/sign-in-as-anyone-bypassing-saml-sso-authentication-with-parser-differentialsExploit, Third Party Advisory
https://github.com/SAML-Toolkits/ruby-saml/commit/acac9e9cc0b9a507882c614f25d41f8b47be349aPatch
https://github.com/SAML-Toolkits/ruby-saml/commit/e2da4c6dae7dc01a4d9cd221395140a67e2b3eb1Patch
https://github.com/SAML-Toolkits/ruby-saml/releases/tag/v1.12.4Release Notes
https://github.com/SAML-Toolkits/ruby-saml/releases/tag/v1.18.0Release Notes
https://github.com/SAML-Toolkits/ruby-saml/security/advisories/GHSA-92rq-c8cf-prrqVendor Advisory
https://github.com/omniauth/omniauth-saml/security/advisories/GHSA-hw46-3hmr-x9xvVendor Advisory
https://securitylab.github.com/advisories/GHSL-2024-355_ruby-samlExploit, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2025/04/msg00011.html
https://security.netapp.com/advisory/ntap-20250314-0008/Third Party Advisory

Timeline

Published: Mar 12, 2025
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2025-25293?

How severe is CVE-2025-25293?

CVE-2025-25293 has a CVSS score of 7.7/10 (HIGH severity). The EPSS model estimates a 1.36% probability of exploitation in the next 30 days.

How do I fix CVE-2025-25293?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-25293?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST