WebExtensions with the "ActiveTab" permission are able to access frames hosted within the active tab even if the frames are cross-origin. Malicious extensions can inject frames from arbitrary origins into the loaded page and then interact with them, bypassing same-origin user expectations with this permission. This vulnerability affects Firefox < 58.
[
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "57.0.4"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "14.04"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "16.04"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "17.10"
}
]
}
]
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-5116.json"