Activity Stream can display content from sent from the Snippet Service website. This content is written to innerHTML on the Activity Stream page without sanitization, allowing for a potential access to other information available to the Activity Stream, such as browsing history, if the Snipper Service were compromised. This vulnerability affects Firefox < 68.
[
{
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"lessThan": "68",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
]