An AJAX action registered by the WPBakery Page Builder (Visual Composer) Clipboard WordPress plugin before 4.5.6 did not have capability checks nor sanitization, allowing low privilege users (subscriber+) to call it and set XSS payloads, which will be triggered in all backend pages.
[
{
"product": "WPBakery Page Builder (Visual Composer) Clipboard",
"vendor": "bitorbit",
"versions": [
{
"lessThan": "4.5.0*",
"status": "affected",
"version": "4.5.0",
"versionType": "custom"
},
{
"lessThan": "4.5.6",
"status": "affected",
"version": "4.5.6",
"versionType": "custom"
}
]
}
]