The Email Subscription Popup WordPress plugin before 1.2.20 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin
[
{
"vendor": "Unknown",
"product": "Email Subscription Popup",
"versions": [
{
"status": "affected",
"versionType": "semver",
"version": "0",
"lessThan": "1.2.20"
}
],
"defaultStatus": "unaffected",
"collectionURL": "https://wordpress.org/plugins"
}
]