description: The existence of a specifically requested local file can be found due to the double firing of the "onerror" when the "source" attribute on a "<track>" tag refers to a file that does not exist if the source page is loaded locally. This vulnerability affects Firefox < 51.
problem types: Disclosure of local file existence through TRACK tag error messages
affected:
{
product: Firefox
vendor: Mozilla
versions:
lessThan: 51, status: affected, version: unspecified, versionType: custom
}