📔Booked v2.5.5/LabArchives Scheduler Vulnerability

My first CVE? CVE-2023-24058

Hey you hackers,

I think I finally found my first CVE. It is a simple one but a new one none the less. This vulnerability in Booked Scheduler, tested on version 2.5.5 and the latest version of LabArchives Schedule, allows for authenticated users to create and schedule events for any other user as long as they have their user ID.

To do this it is as simple as changing the user ID in the HTTP POST request being sent to 'reservation_save.php':

My user ID is not 3 but 159 but changing the request UserId value to 3 created a reservation for the user with ID 3 and this is reflected when you go view the calendar page and see an event under that user name at the time and date specified.

This has been marked as CVE-2023-24058.