CVE-2019-11708
Mozilla Firefox and Thunderbird Sandbox Escape Vulnerability
Mozilla Firefox and ThunderbirdApplications & CMS
CVSS
10.0CriticalExploit odds (EPSS)55.9%Chance of exploitation activity in the next 30 days, higher than 99% of CVEs. Scored 23 Oct 2026FIRST EPSS
CISA required actionApply updates per vendor instructions. CISA KEV
What fixes it
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Timeline
- 23 Jul 2019, 13:20 UTCPublishedCVE List
- 7 Dec 2019Exploit code publicExploit-DB
- 23 May 2022Added to CISA KEVCISA KEV
Public exploit code and templates 1
- Local exploitMozilla FireFox (Windows 10 x64) - Full Chain Client Side Attack 7 Dec 2019Exploit-DB
Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.
Description
Mozilla Firefox and Thunderbird contain a sandbox escape vulnerability that could result in remote code execution.
Text from CVE List
Affected versions 3
- Firefox ESRaffected: unspecified before 60.7.2CVE List
- Firefoxaffected: unspecified before 67.0.4CVE List
- Thunderbirdaffected: unspecified before 60.7.2CVE List
References 6
- mozilla.org/security/advisories/mfsa2019-19/Advisoryvia CVE List
- mozilla.org/security/advisories/mfsa2019-20/Advisoryvia CVE List
- security.gentoo.org/glsa/201908-12Advisoryvia CVE List
- nvd.nist.gov/vuln/detail/CVE-2019-11708Referencevia CISA KEV
- bugzilla.mozilla.org/show_bug.cgi?id=1559858Referencevia CVE List
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-11708Referencevia CVE List