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CVE-2017-11428

25
FAUCET Score

CVE-2017-11428 describes a critical vulnerability in OneLogin Ruby-SAML versions 1.6.0 and earlier, where improper handling of XML DOM traversal and canonicalization allows attackers to manipulate SAML data without invalidating cryptographic signatures. This flaw could enable attackers to bypass authentication to SAML service providers. With a CVSS score of 9.8 (Critical), the vulnerability is easily exploitable over the network with no user interaction, leading to complete compromise of confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion and media coverage, indicating high awareness of its potential impact.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.6.0CPE matchmatch criteria
cpe:2.3:a:onelogin:ruby-saml:*:*:*:*:*:*:*:*
< 1.6.0CPE match
cpe:2.3:a:onelogin:ruby-saml:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.7HIGH

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.1
Impact Score
4.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.51%
Probability of exploitation in next 30 days
EPSS Percentile
83.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0251 is in the 73rd percentile among its peer group of 36,833 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

rubygemspatch availablevia ghsa
Product: ruby-samlFixed in: 1.7.0

Vendor Advisories (1)

rubygemsGHSA-x2fr-v8wf-8wwvhigh

Ruby-SAML Improper Authentication vulnerability

Jul 5, 2019

References

duo.com / blog/duo-finds-saml-vulnerabilities-affecting-multiple-implementations
ExploitTechnical DescriptionThird Party Advisory
kb.cert.org / vuls/id/475445
Third Party AdvisoryUS Government Resource