XSS Vulnerabilities in Booked Scheduler


Advisory by Netsparker (now Invicti)
Name: XSS Vulnerabilities in Booked Scheduler
Software: Booked Scheduler v2.5.6 and possibly below.
Vendor Homepage: http://www.bookedscheduler.com/
Vulnerability Type: Cross-site Scripting
Severity: Critical
Researcher: Omar Kurt
Advisory Reference: NS-14-022


Booked (formerly phpScheduleIt) is a simple but powerful reserve-anything scheduler. With flexible layouts, custom rules, a powerful administrative backend, and an unbelievably simple user experience, Booked can fit almost any need. From conference rooms to lab equipment to airplanes – it’s Booked.


Booked Scheduler is affected by XSS vulnerabilities in version v2.5.6.
Booked Scheduler PoC urls are as follows:

  • Cross-site Scripting

Learn more about Cross-site Scripting vulnerabilities:



Advisory Timeline

09/06/2014 – First Contact
09/06/2014 – Second Contact
09/06/2014 – Vulnerability fixed
23/06/2014 – Advisory released


It has been discovered on testing of Invicti Web Application Security Scanner.

About Invicti

Invicti® can find and report security issues such as SQL Injection and Cross-site Scripting (XSS) in all web applications regardless of the platform and the technology they are built on. Invicti’s unique detection and exploitation techniques allows it to be dead accurate in reporting hence it’s the first and the only False Positive Free web application security scanner.