CVE-2019-9821 describes a use-after-free vulnerability in Mozilla Firefox versions prior to 67, stemming from a race condition within the AssertWorkerThread function when handling shared workers. This flaw carries a high severity CVSS score of 8.1, indicating a potentially exploitable crash that could lead to high impact on confidentiality, integrity, and availability, with a network attack vector and high attack complexity. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 67.0CPE matchmatch criteria | cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* | ||
< 67CPE match | cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
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The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.