Attackers are weaponizing CyberPanel’s SnappyMail logging configuration to create persistent root-level webshells by renaming log files with PHP extensions and injecting code via failed login attempts. This technique effectively bypasses application-layer security tools by hiding the backdoor in the server management environment, enabling automated re-injections into webroots that persist after standard cleanups. Developers and system administrators must secure server-level application configurations and audit sudoer files to prevent unauthorized privilege escalation from service accounts.
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