{"uuid": "e2945af5-6bbf-4844-aea5-aba15ce28982", "vulnerability": {"vulnId": "CVE-2020-6820", "altId": []}, "gcve": {"origin_uuid": "caeb2787-0d58-4236-9039-7c86c3e566f3", "object_uuid": "e2945af5-6bbf-4844-aea5-aba15ce28982"}, "status": {"exploited": true, "status_reason": "confirmed", "status_updated_at": "2021-11-03T01:00:00+01:00"}, "timestamps": {"asserted_at": "2021-11-03T00:00:00+00:00", "recorded_at": "2026-10-02T07:08:31+00:00", "first_seen_at": "2021-11-03T00:00:00+00:00"}, "scope": {"notes": "Under certain conditions, when handling a ReadableStream, a race condition can cause a use-after-free. We are aware of targeted attacks in the wild... | Affected: Mozilla / Thunderbird, Firefox, Firefox ESR | CVSS: 8.1 (HIGH) | EPSS: 0.07063 | Used in malware: unknown | Not yet in CISA KEV: False"}, "evidence": [{"type": "public_report", "source": "previdian", "signal": "successful_exploitation", "confidence": 0.7, "details": {"feed": "Previdian (previdian.com)", "title": "Under certain conditions, when handling a ReadableStream, a race condition can cause a use-after-free. We are aware of targeted attacks in the wild...", "cve_id": "CVE-2020-6820", "vendor": "Mozilla", "ghsa_id": null, "product": "Thunderbird, Firefox, Firefox ESR", "added_date": "2021-11-03T00:00:00.000Z", "cvss_score": 8.1, "epss_score": 0.07063, "previous_ids": [], "cvss_severity": "HIGH", "virtual_patch": false, "cvss_estimated": false, "epss_percentile": 0.94013, "used_in_malware": "unknown", "vulnerability_id": "CVE-2020-6820", "ahead_of_cisa_kev": null, "not_yet_in_cisa_kev": false}}], "references": [{"id": "CVE-2020-6820", "url": "https://www.cve.org/CVERecord?id=CVE-2020-6820"}, {"id": "previdian", "url": "https://previdian.com/CVE-2020-6820"}]}