CVE-2021-24225: Elbtide Advanced Booking Calendar

Medium severity, CVSS 5.4. EPSS: 0.7% chance of exploitation in the next 30 days.

The Advanced Booking Calendar WordPress plugin before 1.6.7 did not sanitise the calId GET parameter in the "Seasons & Calendars" page before outputing it in an A tag, leading to a reflected XSS issue

Affected products

• Elbtide Advanced Booking Calendar: before 1.6.7 (fixed in 1.6.7)

Published 2021-04-12. Last modified 2026-06-17.