CVE-2017-20273: Joomalshowroom Event Registration Pro Calendar

High severity, CVSS 8.2. EPSS: 0.4% chance of exploitation in the next 30 days.

Joomla Event Registration Pro Calendar 4.1.3 contains an SQL injection vulnerability that allows unauthenticated attackers to execute arbitrary SQL queries by injecting malicious code through the id parameter. Attackers can send GET requests to index.php with option=com_registrationpro&view=category&id parameter containing SQL injection payloads to extract sensitive database information.

Affected products

• Joomalshowroom Event Registration Pro Calendar: version 4.1.3 only

Published 2026-06-19. Last modified 2026-08-21.