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Debian: Thunderbird Critical Arbitrary Code Exec Update DLA-4372-1

debian lts
Calendar Grey November 16, 2025
Dist Debian Esm H88
Debian LTS advisory on critical Thunderbird update fixing multiple security issues, ensuring protection against arbitrary code execution.
Multiple security issues were discovered in Thunderbird, which could potentially result in the execution of arbitrary code or bypass of the same-origin policy
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security advisory critical debian arbitrary code thunderbird executions

Summary

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

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/source-package/thunderbird

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
critical
Lowest
Low
Medium
High
Critical

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

Topics%20covered

Topics Covered

security advisory critical debian arbitrary code thunderbird executions

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