# JMSAppender used on Logstash 2.3.4 and Elasticsearch 2.3.4

**URL:** https://discuss.elastic.co/t/jmsappender-used-on-logstash-2-3-4-and-elasticsearch-2-3-4/292127
**Category:** Elasticsearch
**Created:** [December 16, 2021, 9:58am UTC](https://discuss.elastic.co/t/jmsappender-used-on-logstash-2-3-4-and-elasticsearch-2-3-4/292127 "2021-12-16T09:58:28Z")
**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: [December 19, 2021, 11:12pm UTC](https://discuss.elastic.co/t/jmsappender-used-on-logstash-2-3-4-and-elasticsearch-2-3-4/292127/2 "2021-12-19T23:12:02Z")

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2.X is [EOL](https://www.elastic.co/support/eol) and no longer supported. Please upgrade as a matter of urgency.

[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) has more info.

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_[View the full topic](https://discuss.elastic.co/t/jmsappender-used-on-logstash-2-3-4-and-elasticsearch-2-3-4/292127)._