CVE-2024-11855
Koalendar – Events & Appointments Booking Calendar <= 1.0.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via height Parameter
CVSS Score
6.4
EPSS Score
0.0%
EPSS Percentile
0th
The Koalendar – Events & Appointments Booking Calendar plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘height’ parameter in all versions up to, and including, 1.0.2 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.
| CWE | CWE-79 |
| Vendor | koalendar |
| Product | koalendar – easy appointment scheduling & booking plugin |
| Published | Dec 14, 2024 |
| Last Updated | Apr 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
koalendar / Koalendar – Easy Appointment Scheduling & Booking Plugin
0 ≤ 1.0.2
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/cbbbf5fe-0369-4de6-9b2f-957286b6f394?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/koalendar-free-booking-widget/trunk/koa-wordpress.php#L29 wordpress.org: https://wordpress.org/plugins/koalendar-free-booking-widget/#developers plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset/3207869/koalendar-free-booking-widget/trunk/koa-wordpress.php
Credits
Peter Thaleikis