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CVE detail

CVE-2025-25291

ruby-saml provides security assertion markup language (SAML) single sign-on (SSO) for Ruby. An authentication bypass vulnerability was found in ruby-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 entirely different document structures from the same XML input. That allows an attacker to be able to execute a Signature Wrapping attack. This issue may lead to authentication bypass. Versions 1.12.4 and 1.18.0 fix the issue.

CVSS 9.3 · CriticalBuzz score 21.0

Buzz score

Why this CVE is surfacing

Buzz score total 21.0

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 11.0 · diversity 10.0 · KEV 0.0 · OTX 0.0 · PoC 0.0
Mention score
11.0
2 evidence mentions in the snapshot
Diversity score
10.0
2 sources across 2 categories
KEV score
0.0
No KEV entry observed
OTX score
0.0
0 OTX pulses
PoC score
0.0
0 repos · best confidence N/A
Best PoC traction
0
Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions
0
within the 30d window
Peak daily
0
highest bucket

Evidence

Source links by recency

Newest mentions first
2 source links · newest first
  • GitLab addressed critical auth bypass flaws in CE and EESecurity Affairs

    GitLab addressed two critical authentication bypass vulnerabilities in Community Edition (CE) and Enterprise Edition (EE). GitLab released security updates to address critical vulnerabilities in Community Edition (CE) and Enterprise Edition (EE). The company addressed nine vulnerabilities, including the two critical ruby-saml authentication bypass issues respectively tracked as CVE-2025-25291 and CVE-2025-25292. GitLab CE/EE versions 17.7.7, 17.8.5, […]

    newssecurityaffairs.comMar 13, 2025, 10:05 PM
  • Sign in as anyone: Bypassing SAML SSO authentication with parser differentialsGitHub Security Lab

    Critical authentication bypass vulnerabilities (CVE-2025-25291 + CVE-2025-25292) were discovered in ruby-saml up to version 1.17.0. In this blog post, we’ll shed light on how these vulnerabilities that rely on a parser differential were uncovered.

    vendorgithub.blogMar 12, 2025, 9:07 PM

Exploit code

Public exploit repository references

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0 repository references · best confidence N/A · max 0 stars
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