class.upload.php in verot.net class.upload before 1.0.3 and 2.x before 2.0.4, as used in the K2 extension for Joomla! and other products, omits .phar from the set of dangerous file extensions.
packetstormsecurity.com/files/155577/Verot-2.0.3-Remote-Code-Execution.html
github.com/getk2/k2/commit/d1344706c4b74c2ae7659b286b5a066117155124
github.com/jra89/CVE-2019-19576
github.com/verot/class.upload.php/commit/5a7505ddec956fdc9e9c071ae5089865559174f1
github.com/verot/class.upload.php/commit/db1b4fe50c1754696970d8b437f07e7b94a7ebf2
github.com/verot/class.upload.php/compare/1.0.2...1.0.3
github.com/verot/class.upload.php/compare/2.0.3...2.0.4
medium.com/%40jra8908/cve-2019-19576-e9da712b779
www.verot.net
www.verot.net/php_class_upload.htm