As a simple library, class.upload.php does not perform an in-depth check on uploaded files, allowing a stored XSS vulnerability when the default configuration is used.
Developers must be aware of that fact and use extension whitelisting accompanied by forcing the server to always provide content-type based on the file extension.
The README has been updated to include these guidelines.
[
{
"defaultStatus": "affected",
"product": "class.upload.php",
"repo": "https://github.com/verot/class.upload.php",
"vendor": "class.upload.php",
"versions": [
{
"lessThanOrEqual": "*",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
]