Detectify rapidly developed a security test to detect the critical vulnerability CVE-2021-44228, also known as the Apache log4j RCE, thanks to a proof-of-concept received from its Crowdsource community. This vulnerability allows attackers to execute arbitrary code when they can control log messages or parameters, affecting various software such as Solr, Druid, Flink, and others. Rated with a severity score of 10.0 by Apache.org, it impacts all log4j-core versions from 2.0-beta9 to 2.14.1. Detectify advises customers to scan their assets immediately, stressing the importance of crowdsourcing in security research for quickly identifying vulnerabilities. Apache has provided mitigation strategies for different versions of log4j, and the security community is closely monitoring developments through platforms like Reddit. Detectify encourages both current and potential customers to utilize their scanning services to protect against this vulnerability.