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CVE-2018-5387

25
FAUCET Score

CVE-2018-5387 describes a vulnerability in Wizkunde SAMLBase where improper handling of XML DOM traversal and canonicalization could allow an attacker to alter SAML data without invalidating its cryptographic signature. This high-severity flaw (CVSS 7.5) could lead to authentication bypass for SAML service providers, requiring no user interaction or complex attack methods. Despite its potential impact, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.4.2CPE matchmatch criteria
cpe:2.3:a:wizkunde:samlbase:*:*:*:*:*:*:*:*
< 1.2.7CPE match
cpe:2.3:a:wizkunde:samlbase:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.66%
Probability of exploitation in next 30 days
EPSS Percentile
74.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0166 is in the 56th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: gogentooss/samlbaseFixed in: 1.2.7
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-7gh2-8q93-87hphigh

Wizkunde SAMLBase SAML Bypass

May 13, 2022

References

duo.com / blog/duo-finds-saml-vulnerabilities-affecting-multiple-implementations
ExploitThird Party Advisory
github.com / GoGentoOSS/SAMLBase/commit/482cdf8c090e0f1179073034ebcb609ac7c3f5b3
PatchThird Party Advisory
github.com / GoGentoOSS/SAMLBase/issues/3
Issue TrackingPatchThird Party Advisory
kb.cert.org / vuls/id/475445
Third Party AdvisoryUS Government Resource