Medium severity6.4NVD Advisory· Published Mar 7, 2026· Updated Apr 22, 2026

CVE-2026-1902

Description

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.

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Patches

Vulnerability mechanics

References

plugins.trac.wordpress.org/browser/hammas-calendar/tags/1.5.11/hp-calendar.phpnvd
plugins.trac.wordpress.org/browser/hammas-calendar/tags/1.5.11/src/HpPlugin.phpnvd
plugins.trac.wordpress.org/changesetnvd
www.wordfence.com/threat-intel/vulnerabilities/id/03956922-988a-4cb6-bf20-51878a5b1555nvd

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