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CVE-2025-25293— ruby-saml vulnerable to Remote Denial of Service (DoS) with compressed SAML responses

Quick assessment

Affected
SAML-Toolkits ruby-saml
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Onelogin OneLogin ruby-saml是美国Onelogin公司的一款基于Ruby的、用于单点登录（SSO）服务的SAML（安全断言标记语言）库。 ruby-saml 1.12.4和1.18.0之前版本存在安全漏洞，该漏洞源于未正确处理压缩的SAML响应，可能导致拒绝服务。

AI Predicted 7.5 Difficulty: Moderate EPSS 1.53% · P74
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I. Basic Information for CVE-2025-25293

Vulnerability Information
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Vulnerability Title
ruby-saml vulnerable to Remote Denial of Service (DoS) with compressed SAML responses
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
OneLogin ruby-saml 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Onelogin OneLogin ruby-saml是美国Onelogin公司的一款基于Ruby的、用于单点登录（SSO）服务的SAML（安全断言标记语言）库。 ruby-saml 1.12.4和1.18.0之前版本存在安全漏洞，该漏洞源于未正确处理压缩的SAML响应，可能导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
SAML-Toolkits ruby-saml < 1.12.4 -

II. Public POCs for CVE-2025-25293

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III. Intelligence Information for CVE-2025-25293

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Patches & Fixes for CVE-2025-25293 (3)

Vendor Advisories for CVE-2025-25293 (2)

Other References for CVE-2025-25293 (3)

Same Patch Batch · SAML-Toolkits · 2025-03-12 · 3 CVEs total

CVE-2025-25291 ruby-saml vulnerable to SAML authentication bypass due to DOCTYPE handling (parser differe
CVE-2025-25292 Ruby SAML vulnerable to SAML authentication bypass due to namespace handling (parser diffe

IV. Related Vulnerabilities

Same product: ruby-saml
Same vendor: SAML-Toolkits
Same weakness: CWE-400

V. Comments for CVE-2025-25293

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