CVE-2018-5387: Wizkunde SAMLBase may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a

Q: How do I fix CVE-2018-5387?

samlbase: upgrade to 1.4.2. Exact commands for each OS are on this page.

Q: Is CVE-2018-5387 being exploited?

CVE-2018-5387 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2018-5387 affect?

CVE-2018-5387 affects samlbase. Severity is high (CVSS 7.5). Wizkunde SAMLBase may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a way that an attacker may be able to manipulate the SAML data without invalidating the cryptographic signature, allowing the attac

Q: How urgent is CVE-2018-5387?

Priority 55/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2018-5387 is a high-severity flaw (CVSS 7.5) affecting samlbase. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Wizkunde SAMLBase may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a way that an attacker may be able to manipulate the SAML data without invalidating the cryptographic signature, allowing the attack to potentially bypass authentication to SAML service providers.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.7% (top 23%)
CISA exploited list	No
Weakness	CWE-287, CWE-347
Published	2018-07-24
Last modified	2026-06-17

Publisher (CNA): CERT/CC · Vendor: wizkunde

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-07-24 15:29 UTCPublished CVE record published
2026-06-17 02:00 UTCUpdated Record last modified

wizkunde samlbase UPGRADE

Affected: < 1.4.2

Fixed in: 1.4.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy samlbase || rpm -q samlbase || samlbase --version

2. UPGRADE to 1.4.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade samlbase

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade samlbase

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-5387?

samlbase: upgrade to 1.4.2. Exact commands for each OS are on this page.

Is CVE-2018-5387 being exploited?

CVE-2018-5387 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-5387 affect?

CVE-2018-5387 affects samlbase. Severity is high (CVSS 7.5). Wizkunde SAMLBase may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a way that an attacker may be able to manipulate the SAML data without invalidating the cryptographic signature, allowing the attac

How urgent is CVE-2018-5387?

Priority 55/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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