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

[SECURITY] [DSA 5464-1] firefox-esr security update

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Debian Security Advisory DSA-5464-1 security@debian.org
https://www.debian.org/security/ Moritz Muehlenhoff
August 03, 2023 https://www.debian.org/security/faq
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Package : firefox-esr
CVE ID : CVE-2023-4045 CVE-2023-4046 CVE-2023-4047 CVE-2023-4048
CVE-2023-4049 CVE-2023-4050 CVE-2023-4055 CVE-2023-4056

Multiple security issues have been found in the Mozilla Firefox web
browser, which could potentially result in the execution of arbitrary
code, bypass of the same-origin policy, spoofing or sandbox bypass.

For the oldstable distribution (bullseye), these problems have been fixed
in version 102.14.0esr-1~deb11u1.

For the stable distribution (bookworm), these problems have been fixed in
version 102.14.0esr-1~deb12u1.

We recommend that you upgrade your firefox-esr packages.

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

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/