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Debian: firefox-esr Important Threat of Code Execution DSA-6054-1

debian
Calendar Grey November 12, 2025
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Several critical security issues found in Firefox ESR may lead to code execution or policy bypass. Immediate upgrade recommended.
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

Summary

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.

For the oldstable distribution (bookworm), these problems have been fixed
in version 140.5.0esr-1~deb12u1.

For the stable distribution (trixie), these problems have been fixed in
version 140.5.0esr-1~deb13u1.

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



Severity
important
Lowest
Low
Medium
High
Critical

Package: firefox-esr
CVE ID: CVE-2025-13012 CVE-2025-13013 CVE-2025-13014

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