CVE•Published 2025-12-09•Modified 2026-10-14•1 article on news•5 live references•NVD data
CVE-2025-66567Onelogin · Ruby-saml
Vulnerability data via NVD (ingested)
CVSS v3.1
9.1
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS percentile
31
Exploit Prediction Scoring System · top 69% of all CVEs
Weaknesses (CWE)
Description
The ruby-saml library is for implementing the client side of a SAML authorization. ruby-saml versions up to and including 1.12.4 contain an authentication bypass vulnerability due to an incomplete fix for CVE-2025-25292. ReXML and Nokogiri parse XML differently, generating entirely different document structures from the same input. This allows an attacker to execute a Signature Wrapping attack. This issue is fixed in version 1.18.0.
Timeline
Published 2025-12-09
Modified 2026-10-14
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2025-66567Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Onelogin Ruby-saml"All exposed Onelogin Ruby-saml instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Ruby-saml"HTTP body or banner mentions "Ruby-saml" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2025-66567Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2025-66567Censys host search filtered to this CVE id.
grep.app
CVE-2025-66567Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2025-66567GitHub code search for direct mentions.
Google dork
"CVE-2025-66567" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.