CVE-2021-24606: Offshorewebmaster Availability Calendar

High severity, CVSS 8.8. EPSS: 1.3% chance of exploitation in the next 30 days.

The Availability Calendar WordPress plugin before 1.2.1 does not escape the category attribute from its shortcode before using it in a SQL statement, leading to a SQL Injection issue, which can be exploited by any user able to add shortcode to posts/pages, such as contributor+

Affected products

• Offshorewebmaster Availability Calendar: before 1.2.1 (fixed in 1.2.1)

Published 2021-09-20. Last modified 2026-06-17.