This issue was addressed with improved iframe sandbox enforcement. This issue is fixed in Safari 13.0.1, iOS 13. Maliciously crafted web content may violate iframe sandboxing policy.
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-8771.json"
[ { "events": [ { "introduced": "0" }, { "fixed": "13.0.1" } ] }, { "events": [ { "introduced": "0" }, { "fixed": "13.0." } ] } ]