The Sign-up Sheets WordPress plugin before 2.2.13 does not escape some generated URLs, as well as the $_SERVER[βREQUEST_URIβ] parameter before outputting them back in attributes, which could lead to Reflected Cross-Site Scripting.
[
{
"vendor": "Unknown",
"product": "Sign-up Sheets",
"versions": [
{
"status": "affected",
"versionType": "semver",
"version": "0",
"lessThan": "2.2.13"
}
],
"defaultStatus": "unaffected"
}
]