CVE-2021-43528

Name	CVE-2021-43528
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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-2874-1, DSA-5034-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
thunderbird (PTS)	bullseye	1:115.12.0-1~deb11u1	fixed
	bullseye (security)	1:128.6.0esr-1~deb11u1	fixed
	bookworm	1:128.5.0esr-1~deb12u1	fixed
	bookworm (security)	1:128.6.0esr-1~deb12u1	fixed
	sid, trixie	1:128.6.0esr-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin
thunderbird	source	stretch	1:91.4.1-1~deb9u1	DLA-2874-1
thunderbird	source	buster	1:91.4.1-1~deb10u1	DSA-5034-1
thunderbird	source	bullseye	1:91.4.1-1~deb11u1	DSA-5034-1
thunderbird	source	(unstable)	1:91.4.0-1

https://www.mozilla.org/en-US/security/advisories/mfsa2021-54/#CVE-2021-43528