# Elastic Stack 6.4.1 and 5.6.12 security update **URL:** \ **Category:** Security Announcements\ **Created:** [September 19, 2018, 1:18am UTC](https://discuss.elastic.co/t/elastic-stack-6-4-1-and-5-6-12-security-update/149035 "2018-09-19T01:18:59Z")\ **Posts on this page:** 1\ **Showing post:** 1
**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:** [September 19, 2018, 1:18am UTC](https://discuss.elastic.co/t/elastic-stack-6-4-1-and-5-6-12-security-update/149035/1 "2018-09-19T01:18:59Z")
**Kibana XSS issue (ESA-2018-14)** Kibana versions 5.3.0 to 6.4.1 had a cross-site scripting (XSS) vulnerability via the source field formatter that could allow an attacker to obtain sensitive information from or perform destructive actions on behalf of other Kibana users. **Affected Versions** Versions after 5.3.0 and before 6.4.1 or 5.6.12 **Solutions and Mitigations** Users should upgrade to Kibana version 6.4.1 or 5.6.12. There are no known workarounds for this issue. **CVE ID:** CVE-2018-3830 * * * **Elasticsearch information disclosure (ESA-2018-15)** Elasticsearch Alerting and Monitoring in versions before 6.4.1 or 5.6.12 have an information disclosure issue when secrets are configured via the API. The Elasticsearch \_cluster/settings API, when queried, could leak sensitive configuration information such as passwords, tokens, or usernames. This could allow an authenticated Elasticsearch user to improperly view these details. **Affected Versions** Elasticsearch version before 6.4.1 or 5.6.12 **Solutions and Mitigations** Users should upgrade to Elasticsearch version 6.4.1 or 5.6.12. There are no known workarounds for this issue. **CVE ID:** CVE-2018-3831 --- _[View the full topic](https://discuss.elastic.co/t/elastic-stack-6-4-1-and-5-6-12-security-update/149035)._