CVE-2026-48944 Joomla Extension - getk2.com - Exposure of sensitive files via attachment copy in K2 extension for Joomla < 2.26

The K2 frontend article-save handler accepts an attachmentNexisting POST field that is concatenated with JPATHSITE/ and passed to JFile::copy. JPath::clean does NOT strip .., and there is no allow-list of source paths. An Author can therefore copy configuration.php or any other file readable by t...