CVE-2026-73373: Joomla!

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

Joomla! Core - [20260810] - Unrestricted uploads of SHTML files in Joomla 1.0.0-5.4.7, 6.0.0-6.1.2 - The default list of dangerous files did not include SHTML files. On servers that executed these files, that could lead to code execution.

Affected products

• Joomla! Joomla!: from 1.0.0, before 5.4.8 (fixed in 5.4.8); from 6.0.0, before 6.1.3 (fixed in 6.1.3)

Published 2026-08-18. Last modified 2026-09-03.