{"vulnerability": "cve-2020-12387", "sightings": [{"uuid": "2a1dafd1-75ec-43a7-afa7-524b1eb5e92b", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2020-12387", "type": "seen", "source": "https://t.me/cibsecurity/12315", "content": "ATENTION\u203c New - CVE-2020-12387\n\nA race condition when running shutdown code for Web Worker led to a use-after-free vulnerability. This resulted in a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.\n\n\ud83d\udcd6 Read\n\nvia \"National Vulnerability Database\".", "creation_timestamp": "2020-05-27T08:55:24.000000Z"}, {"uuid": "d1cf1772-9815-4d88-a9dd-ee8f6a6b0468", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "4f29edb9-4c4b-44ca-b041-9b050656b6ae", "vulnerability": "CVE-2020-12387", "type": "seen", "source": "https://t.me/timcore_hacking/882", "content": "", "creation_timestamp": "2026-08-05T05:00:06.510254Z"}, {"uuid": "3ad6e781-e917-42c4-8d4c-6410c1e2eae7", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "4f29edb9-4c4b-44ca-b041-9b050656b6ae", "vulnerability": "CVE-2020-12387", "type": "exploited", "source": "https://t.me/timcore_hacking/882", "content": "", "creation_timestamp": "2026-08-06T00:00:52.963392Z"}]}