CVE-2018-3822: Elastic X-Pack

Critical severity, CVSS 9.8. EPSS: 1.6% chance of exploitation in the next 30 days.

X-Pack Security versions 6.2.0, 6.2.1, and 6.2.2 are vulnerable to a user impersonation attack via incorrect XML canonicalization and DOM traversal. An attacker might have been able to impersonate a legitimate user if the SAML Identity Provider allows for self registration with arbitrary identifiers and the attacker can register an account which an identifier that shares a suffix with a legitimate account. Both of those conditions must be true in order to exploit this flaw.

Affected products

• Elastic X-Pack: version 6.2.0 only; version 6.2.1 only; version 6.2.2 only

Published 2018-03-30. Last modified 2026-06-17.