A thunderbird security update has been released for Debian GNU/Linux 11 and 12 to address multiple security issues.

[SECURITY] [DSA 5566-1] thunderbird security update

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Debian Security Advisory DSA-5566-1 security@debian.org
https://www.debian.org/security/ Moritz Muehlenhoff
November 26, 2023 https://www.debian.org/security/faq
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Package : thunderbird
CVE ID : CVE-2023-6212 CVE-2023-6209 CVE-2023-6208 CVE-2023-6207
CVE-2023-6206 CVE-2023-6205 CVE-2023-6204

Multiple security issues were discovered in Thunderbird, which could
result in denial of service or the execution of arbitrary code.

For the oldstable distribution (bullseye), these problems have been fixed
in version 1:115.5.0-1~deb11u1.

For the stable distribution (bookworm), these problems have been fixed in
version 1:115.5.0-1~deb12u1.

We recommend that you upgrade your thunderbird packages.

For the detailed security status of thunderbird please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/thunderbird

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/