Cross-site Scripting (XSS) - Stored in GitHub repository alextselegidis/easyappointments prior to 1.5.0.
https://huntr.dev/bounties/1df09505-9923-43b9-82ef-15d94bc3f9dc
https://github.com/alextselegidis/easyappointments/commit/46a865300e94c7031cc0e315d95d3e3e56768498