The Bookster WordPress plugin through 1.1.0 allows adding sensitive parameters when validating appointments allowing attackers to manipulate the data sent when booking an appointment (the request body) to change its status from pending to approved.
Severity
CVSS 3.1
6.5 medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
EPSS
0.4% chance of exploitation in the next 30 days; higher than 34% of CVEs (scores of 2026-10-31)