CVE-2021-45456

CVE-2021-45456 is a critical command injection vulnerability affecting Apache Kylin 4.0.0. The flaw arises from a mismatch in how the DiagnosisService validates project names versus how it uses them in shell commands, allowing an attacker to bypass checks and execute arbitrary commands. With a CVSS score of 9.8 (Critical), this vulnerability is easily exploitable over the network with low complexity and no user interaction, leading to complete compromise of confidentiality, integrity, and availability. Despite its high severity and EPSS score, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.