The Newsletter WordPress plugin before 7.4.6 does not escape and sanitise the preheader_text setting, which could allow high privilege users to perform Stored Cross-Site Scripting attacks when the unfilteredhtml is disallowed
[
{
"product": "Newsletter – Send awesome emails from WordPress",
"vendor": "Unknown",
"versions": [
{
"lessThan": "7.4.6",
"status": "affected",
"version": "7.4.6",
"versionType": "custom"
}
]
}
]