Abantecart through 1.3.2 allows remote authenticated administrators to execute arbitrary code by uploading an executable file, because the Catalog>Media Manager>Images settings can be changed by an administrator (e.g., by configuring .php to be a valid image file type).
An issue was discovered in AbanteCart before 1.3.2. Any low-privileged user with file-upload permissions can upload a malicious SVG document that contains an XSS payload.
AbanteCart 1.2.8 allows SQL Injection via the source_language parameter to admin/controller/pages/localisation/language.php and core/lib/language_manager.php, or via POST data to admin/controller/pages/tool/backup.php and admin/model/tool/backup.php.