CVE-2019-11707

Mozilla Firefox ESR, Mozilla Firefox, Mozilla Thunderbird

Published 23 Jul 2019 · updated 17 Jun 2026 · Analyzed

8.8 High · CVSS 3.1, NVD

Exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on 23 May 2022, with a remediation deadline of 13 Jun 2022 for US federal agencies.

Required action: Apply updates per vendor instructions.

Description

A type confusion vulnerability can occur when manipulating JavaScript objects due to issues in Array.pop. This can allow for an exploitable crash. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Firefox ESR < 60.7.1, Firefox < 67.0.3, and Thunderbird < 60.7.2.

References

bugzilla.mozilla.org/show_bug.cgi?id=1544386 · Issue Tracking, Permissions Required, Vendor Advisory
security.gentoo.org/glsa/201908-12 · Third Party Advisory
www.mozilla.org/security/advisories/mfsa2019-18/ · Vendor Advisory
www.mozilla.org/security/advisories/mfsa2019-20/ · Vendor Advisory
www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-11707 · US Government Resource