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Debian 11: firefox-esr Moderate Code Exec Risks DLA-4370-1

debian lts
Calendar Grey November 13, 2025
Dist Debian Esm H88
Mozilla Firefox web browser faces multiple threats, including arbitrary code execution vulnerabilities needing attention.
Multiple security issues have been found in the Mozilla Firefox web browser, which could potentially result in the execution of arbitrary code or bypass of the same-origin policy
Topics%20covered

Topics Covered

security advisory update debian firefox execution bypass

Summary

For Debian 11 bullseye, these problems have been fixed in version
140.5.0esr-1~deb11u1.

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/source-package/firefox-esr

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


Severity
important
Lowest
Low
Medium
High
Critical

Package: firefox-esr
Version: 140.5.0esr-1~deb11u1
CVE ID: CVE-2025-13012 CVE-2025-13013 CVE-2025-13014 CVE-2025-13015

Topics%20covered

Topics Covered

security advisory update debian firefox execution bypass

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