CVE-2018-3822

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-03-30 · updated 2026-06-17
Weakness: CWE-287

Description

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 Security: 6.2.0, 6.2.1, 6.2.2

References

https://discuss.elastic.co/t/elastic-stack-6-2-3-security-update/124848
https://discuss.elastic.co/t/elastic-stack-6-2-3-security-update/124848

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