CVE-2023-0491: Schedulicity

Medium severity, CVSS 5.4. EPSS: 0.6% chance of exploitation in the next 30 days.

The Schedulicity WordPress plugin through 2.21 does not validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks.

Affected products

• Schedulicity Schedulicity: up to and including 2.2.1

Published 2023-03-27. Last modified 2026-06-17.