# About fix log4j2 vulnerabilities, use the parameter -Dlog4j2.formatMsgNoLookups=true

**URL:** <https://discuss.elastic.co/t/about-fix-log4j2-vulnerabilities-use-the-parameter-dlog4j2-formatmsgnolookups-true/326271>\
**Category:** Elasticsearch\
**Created:** [February 23, 2023, 7:11am UTC](https://discuss.elastic.co/t/about-fix-log4j2-vulnerabilities-use-the-parameter-dlog4j2-formatmsgnolookups-true/326271 "2023-02-23T07:11:05Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [February 23, 2023, 7:17am UTC](https://discuss.elastic.co/t/about-fix-log4j2-vulnerabilities-use-the-parameter-dlog4j2-formatmsgnolookups-true/326271/2 "2023-02-23T07:17:28Z")

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Please see [Apache Log4j2 Remote Code Execution (RCE) Vulnerability - CVE-2021-44228 - ESA-2021-31](https://discuss.elastic.co/t/apache-log4j2-remote-code-execution-rce-vulnerability-cve-2021-44228-esa-2021-31/291476), [Elasticsearch 5.0.0-5.6.10 and 6.0.0-6.3.2: Log4j CVE-2021-44228, CVE-2021-45046 remediation](https://discuss.elastic.co/t/elasticsearch-5-0-0-5-6-10-and-6-0-0-6-3-2-log4j-cve-2021-44228-cve-2021-45046-remediation/292054) and [Apache Log4j2 Remote Code Execution (RCE) Vulnerability - CVE-2021-44228 - ESA-2021-31](https://discuss.elastic.co/t/apache-log4j2-remote-code-execution-rce-vulnerability-cve-2021-44228-esa-2021-31/291476) for mitigation approaches.

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_[View the full topic](https://discuss.elastic.co/t/about-fix-log4j2-vulnerabilities-use-the-parameter-dlog4j2-formatmsgnolookups-true/326271)._