May 23, 2022 · Applied Cybernetics Group
CVE-2019-11707 — Mozilla Firefox and Thunderbird
Mozilla Firefox and Thunderbird Type Confusion Vulnerability
- Added to KEV
2022-05-23- Federal due date
2022-06-13- Vendor
- Mozilla
- Product
- Firefox and Thunderbird
- EPSS
- 99.3th percentile (score 0.843, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2019-11707
CISA short description
Mozilla Firefox and Thunderbird contain a type confusion vulnerability that can occur when manipulating JavaScript objects due to issues in Array.pop, allowing for an exploitable crash.
Required action
Apply updates per vendor instructions.