# Elastic Stack 6.2.3 security update

**URL:** <https://discuss.elastic.co/t/elastic-stack-6-2-3-security-update/124848>\
**Category:** Security Announcements\
**Created:** [March 20, 2018, 7:30pm UTC](https://discuss.elastic.co/t/elastic-stack-6-2-3-security-update/124848 "2018-03-20T19:30:16Z")\
**Posts on this page:** 1\
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**Author:** ![joshbressers](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/joshbressers/32/42332_2.png) [@joshbressers](https://discuss.elastic.co/u/joshbressers)\
**Post date:** [March 20, 2018, 7:30pm UTC](https://discuss.elastic.co/t/elastic-stack-6-2-3-security-update/124848/1 "2018-03-20T19:30:16Z")

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**X-Pack Security SAML vulnerability (ESA-2018-07)**

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 Versions**  
X-Pack Security 6.2.0, 6.2.1, and 6.2.2

**Solutions and Mitigations:**  
Users should upgrade to Elasticsearch version 6.2.3.

**CVE ID:** CVE-2018-3822

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_[View the full topic](https://discuss.elastic.co/t/elastic-stack-6-2-3-security-update/124848)._