# CVE-2025-25291: ruby-saml: ruby-saml provides security assertion markup language (SAML) single sign-on(SSO) for Ruby

CVE-2025-25291 is fixed in ruby-saml on 1 platform, first by ruby-saml 1.7.2-1ubuntu0.1~esm2, released March 12, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-25291
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.2097
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 12, 2025

## Description

ruby-saml provides security assertion markup language (SAML) single sign-on(SSO) for Ruby. An authentication bypass vulnerability was found inruby-saml prior to versions 1.12.4 and 1.18.0 due to a parser differential.ReXML and Nokogiri parse XML differently; the parsers can generate entirelydifferent document structures from the same XML input. That allows anattacker to be able to execute a Signature Wrapping attack. This issue maylead to authentication bypass. Versions 1.12.4 and 1.18.0 fix the issue.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | ruby-saml Debian 11.6 (bullseye) | 1.11.0-1+deb11u2 | [DLA-4115-1](https://patchblox.com/security/data/fix/linux/dla-4115-1.md) | Apr 5, 2025 |
| Linux | ruby-saml Ubuntu 18.04.6 LTS (bionic) | 1.7.2-1ubuntu0.1~esm2 | [ruby-saml 1.7.2-1ubuntu0.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ruby-saml-1.7.2-1ubuntu0.1-esm2.md) | Mar 12, 2025 |
| Linux | ruby-saml Ubuntu 20.04 LTS (focal) | 1.11.0-1ubuntu0.1+esm1 | [ruby-saml 1.11.0-1ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-ruby-saml-1.11.0-1ubuntu0.1-esm1.md) | Mar 12, 2025 |
| Linux | ruby-saml Ubuntu 22.04.1 LTS (jammy) | 1.13.0-1ubuntu0.1+esm1 | [ruby-saml 1.13.0-1ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-ruby-saml-1.13.0-1ubuntu0.1-esm1.md) | Mar 12, 2025 |
| Linux | ruby-saml Ubuntu 24.04.5 LTS (noble) | 1.15.0-1ubuntu0.24.04.1+esm1 | [ruby-saml 1.15.0-1ubuntu0.24.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-ruby-saml-1.15.0-1ubuntu0.24.04.1-esm1.md) | Mar 12, 2025 |
| Linux | ruby-saml Ubuntu 24.10 (oracular) | 1.15.0-1ubuntu0.24.10.2 | [ruby-saml 1.15.0-1ubuntu0.24.10.2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-ruby-saml-1.15.0-1ubuntu0.24.10.2.md) | Jan 16, 2026 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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