CVE-2018-7644

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

The XmlSecLibs library as used in the saml2 library in SimpleSAMLphp before 1.15.3 incorrectly verifies signatures on SAML assertions, allowing a remote attacker to construct a crafted SAML assertion on behalf of an Identity Provider that would pass as cryptographically valid, thereby allowing them to impersonate a user from that Identity Provider, aka a key confusion issue.

Metrics

CVSS 3.0 7.5/10CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-347

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://simplesamlphp.org/security/201802-01Vendor Advisory
https://simplesamlphp.org/security/201802-01Vendor Advisory

Timeline

Published: Mar 5, 2018
Last modified: Jun 17, 2026
NVD status: Modified

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