CVE-2020-15664

MEDIUM

Firefox < 80 and Firefox ESR < 68.12 - Unauthenticated Extension Installation via about:blank eval() Reference

Title source: llm
STIX 2.1

Description

By holding a reference to the eval() function from an about:blank window, a malicious webpage could have gained access to the InstallTrigger object which would allow them to prompt the user to install an extension. Combined with user confusion, this could result in an unintended or malicious extension being installed. This vulnerability affects Firefox < 80, Thunderbird < 78.2, Thunderbird < 68.12, Firefox ESR < 68.12, Firefox ESR < 78.2, and Firefox for Android < 80.

References (7)

Core 7
Core References
Issue Tracking, Permissions Required, Vendor Advisory x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1658214

Scores

CVSS v3 6.5
EPSS 0.0037
EPSS Percentile 59.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Details

CWE
CWE-863
Status published
Products (4)
mozilla/firefox < 80.0 (2 CPE variants)
mozilla/firefox 78.0 - 78.2
mozilla/firefox_esr < 68.12
mozilla/thunderbird < 68.12
Published Oct 01, 2020
Tracked Since Feb 18, 2026