CVE-2026-77989: Joomlaeventmanager.net Jem - Joomla Event Manager Extension For Joomla

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

Joomla Extension - joomlaeventmanager.net - Reflected XSS via the PDF export link in Joomla Events Manager < 5.0.1 - buildCurrentPdfLink copies the current request query string into the PDF button URL, and pdfbutton() echoes it unescaped, leading to an reflected XSS vector.

Affected products

• Joomlaeventmanager.net Jem - Joomla Event Manager Extension For Joomla: version 1.0.0-5.0.0 only

Published 2026-08-27. Last modified 2026-08-28.