CVE-2021-43528

Medium

Description

Thunderbird unexpectedly enabled JavaScript in the composition area. The JavaScript execution context was limited to this area and did not receive chrome-level privileges, but could be used as a stepping stone to further an attack with other vulnerabilities. This vulnerability affects Thunderbird < 91.4.0.

SeverityMedium

CVSS6.5

Exploit probability—

Product

Mozilla Thunderbird

PublishedDec 8, 2021

First seenDec 8, 2021

How to fix

Update

mozilla thunderbird91.4.0 or later

Vendor advisories

debian.org/security/2022/dsa-5034
security.gentoo.org/glsa/202208-14

Affected products

Product	Affected versions	Fixed in
mozilla thunderbird	v < 91.4.0	91.4.0
debian debian_linux	9.0, 10.0, 11.0	—

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