CVE-2019-11708
CRITICALCISA KEVEPSS 99th pctlDescription
Insufficient vetting of parameters passed with the Prompt:Open IPC message between child and parent processes can result in the non-sandboxed parent process opening web content chosen by a compromised child process. When combined with additional vulnerabilities this could result in executing arbitrary code on the user's computer. This vulnerability affects Firefox ESR < 60.7.2, Firefox < 67.0.4, and Thunderbird < 60.7.2.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Exploit Intelligence
Very high risk: more likely to be exploited than 99% of all known CVEs.
Mozilla Firefox and Thunderbird Sandbox Escape Vulnerability
Mozilla Firefox and Thunderbird contain a sandbox escape vulnerability that could result in remote code execution.
Apply updates per vendor instructions.
Remediation due: 2022-06-13
References
- http://packetstormsecurity.com/files/155592/Mozilla-Firefox-Windows-64-Bit-Chain-Exploit.html
- https://bugzilla.mozilla.org/show_bug.cgi?id=1559858
- https://security.gentoo.org/glsa/201908-12
- https://www.mozilla.org/security/advisories/mfsa2019-19/
- https://www.mozilla.org/security/advisories/mfsa2019-20/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-11708
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-27.