FreePBX endpoint SQLi to RCE

FreePBX is an open-source IP PBX management tool that provides a modern phone system for businesses that use
VoIP to make and receive phone calls. Versions before 16.0.44 and 17.0.23 are vulnerable to CVE-2025-66039,
while versions before 16.0.92 and 17.0.6 are vulnerable to CVE-2025-61675. The former represents an
authentication bypass: when FreePBX uses Webserver Authorization Mode (an option the admin can enable), it
allows an attacker to authenticate as any user. The latter CVE describes multiple SQL injections; this module
exploits the SQL injection in the custom extension component. The module chains these vulnerabilities into an
unauthenticated SQL injection attack and gains remote code execution by injecting an SQL record into th
cron_jobs table. The cron_jobs database contains cron tasks that FreePBX executes in the context of the
operating system.