The Welcart e-Commerce WordPress plugin before 2.8.6 does not validate user input before using it in file_exist() functions via various AJAX actions available to any authenticated users, which could allow users with a role as low as subscriber to perform PHAR deserialisation when they can upload a file and a suitable gadget chain is present on the blog
[
{
"vendor": "Unknown",
"product": "Welcart e-Commerce",
"versions": [
{
"status": "affected",
"versionType": "custom",
"version": "0",
"lessThan": "2.8.6"
}
],
"defaultStatus": "unaffected",
"collectionURL": "https://wordpress.org/plugins"
}
]