CVE-2026-1902: Innovaatik Hammas Calendar

Medium severity, CVSS 6.4. EPSS: 0.2% chance of exploitation in the next 30 days.

The Hammas Calendar plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'apix' parameter in the 'hp-calendar-manage-redirect' shortcode in all versions up to, and including, 1.5.11 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected products

• Innovaatik Hammas Calendar: up to and including 1.5.11

Published 2026-03-07. Last modified 2026-06-17.