Joomla Extension - getk2.org - Privileged RCE vulnerability in K2 extension for Joomla < 2.26

The K2 article gallery upload path accepts a zip/tar archive, extracts it under /media/k2/galleries//, and only renames image files (gif/jpg/jpeg/png/webp) to safe names — non-image files (including .php) are extracted as-is and remain executable via direct HTTP access.