CVE-2021-36551: Tiki Tikiwiki Cms/groupware

Medium severity, CVSS 5.4. EPSS: 0.5% chance of exploitation in the next 30 days.

TikiWiki v21.4 was discovered to contain a cross-site scripting (XSS) vulnerability in the component tiki-calendar.php. This vulnerability allows attackers to execute arbitrary web scripts or HTML via a crafted payload under the Add Event module.

Affected products

• Tiki Tikiwiki Cms/groupware: version 21.4 only

Published 2021-10-28. Last modified 2026-06-17.