VULNERABILITY INTELLIGENCE

CVE-2018-7644

CVSS score7.5 HIGH
EPSS probability1.25%
CISA KEVNot currently listed
Published2018-03-05
Last modified2026-06-17
CVSS vectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

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.

Weakness classification

  • CWE-347: Improper Verification of Cryptographic Signature

Primary references