Joomla Framework Filesystem Package
Monthly
Unrestricted SHTML file upload in Joomla! CMS affects all versions from 1.0.0 through 5.4.7 and 6.0.0 through 6.1.2, impacting both the CMS and the Joomla! Framework Filesystem Package. The default blocklist of dangerous file types omitted SHTML files; on servers where SSI (Server Side Includes) is enabled and SHTML execution is active, a privileged user can upload a crafted SHTML file to achieve arbitrary server-side code execution. No public exploit code has been identified at time of analysis, though a vendor advisory has been published at the Joomla Security Centre.
Unrestricted SHTML file upload in Joomla! CMS affects all versions from 1.0.0 through 5.4.7 and 6.0.0 through 6.1.2, impacting both the CMS and the Joomla! Framework Filesystem Package. The default blocklist of dangerous file types omitted SHTML files; on servers where SSI (Server Side Includes) is enabled and SHTML execution is active, a privileged user can upload a crafted SHTML file to achieve arbitrary server-side code execution. No public exploit code has been identified at time of analysis, though a vendor advisory has been published at the Joomla Security Centre.