An XSS Injection vulnerability exists in Sangoma FreePBX and PBXact 13 14 and 15 within the Call Event Logging report screen in the cel module at the admin/config.php?display=cel URI via date fields. This affects cel through 13.0.26.9 14.x through 14.0.2.14 and 15.x through 15.0.15.4.