In the Redirection for Contact Form 7 WordPress plugin before 2.3.4, low level users, such as subscribers, could use the import_from_debug AJAX action to install any plugin from the WordPress repository.
[
{
"product": "Redirection for Contact Form 7",
"vendor": "Query Solutions",
"versions": [
{
"lessThan": "2.3.4",
"status": "affected",
"version": "2.3.4",
"versionType": "custom"
}
]
}
]