The Registrations for the Events Calendar WordPress plugin before 2.12.4 does not sanitise and escape some parameters when accepting event registrations, which could allow unauthenticated users to perform Cross-Site Scripting attacks.
Severity
CVSS 3.1
9.6 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
EPSS
0.7% chance of exploitation in the next 30 days; higher than 54% of CVEs (scores of 2026-10-31)