Accepting the value of the altField option of the Datepicker widget from untrusted sources may execute untrusted code. For example, initializing the datepicker in the following way:
$( "#datepicker" ).datepicker( {
altField: "<img onerror='doEvilThing()' src='/404' />",
} );
will call the doEvilThing function.
The issue is fixed in jQuery UI 1.13.0. Any string value passed to the altField option is now treated as a CSS selector.
A workaround is to not accept the value of the altField option from untrusted sources.
If you have any questions or comments about this advisory, search for a relevant issue in the jQuery UI repo. If you don't find an answer, open a new issue.
{
"nvd_published_at": "2021-10-26T15:15:00Z",
"severity": "MODERATE",
"github_reviewed_at": "2021-10-25T22:06:41Z",
"github_reviewed": true,
"cwe_ids": [
"CWE-79"
]
}