- 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.
- Source
- security-advisories@github.com
- NVD status
- Analyzed
- Products
- ruby-saml
CVSS 4.0
- Type
- Secondary
- Base score
- 9.3
- Impact score
- -
- Exploitability score
- -
- Vector string
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/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
- Severity
- CRITICAL
CVSS 3.1
- Type
- Primary
- Base score
- 9.1
- Impact score
- 5.2
- Exploitability score
- 3.9
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- Severity
- CRITICAL
- security-advisories@github.com
- CWE-347
- Hype score
- Not currently trending
#VulnerabilityReport #AuthenticationBypass Critical Authentication Bypass Flaws Discovered in Ruby SAML Library (CVE-2025-66567 & CVE-2025-66568) https://t.co/K9r7F9lQs6
@Komodosec
15 Jan 2026
23 Impressions
0 Retweets
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Ruby Samlに深刻な認証バイパス 脆弱性(CVE-2025-66567／66568) https://t.co/hs6iyZ2mZ1 #セキュリティ対策Lab #セキュリティ #Security
@securityLab_jp
11 Dec 2025
115 Impressions
1 Retweet
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🚨 Upozorňujeme na zranitelnosti v Ruby-SAML, CVE-2025-66567 a CVE-2025-66568. Tyto zranitelnosti umožňují obejít validaci SAML assertion a tím pádem útočníkům umožňují vydávat se za legitimní uživatele bez platných přihlašovacích údajů. Problém vycház
@GOVCERT_CZ
10 Dec 2025
286 Impressions
1 Retweet
1 Like
0 Bookmarks
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🚨 SAML SIGN-IN HIJACK — CVE-2025-66567 (ruby-saml)! Authentication can be bypassed via namespace/parser differences. Upgrade to 1.18.0+ NOW. If you can’t patch: disable public SSO, rotate keys/sessions & audit logins. 🔍 https://t.co/8yW5uv6ZDQ #SAML #AppSec #Vulert
@vulert_official
9 Dec 2025
5 Impressions
0 Retweets
0 Likes
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0 Quotes
[
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:onelogin:ruby-saml:*:*:*:*:*:*:*:*",
"matchCriteriaId": "16781771-8893-4189-B51B-66319E3B378C",
"versionEndExcluding": "1.18.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
]