This attack required the attacker to manipulate a developer into
interacting with a domain & subdomain they control as well as enter
the debugger PIN. But if successful, it would have allowed full
access to the debugger, even if the server was only running on
localhost.
For Debian 11 bullseye, this problem has been fixed in version
1.0.1+dfsg1-2+deb11u2.
We recommend that you upgrade your python-werkzeug packages.
For the detailed security status of python-werkzeug please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/python-werkzeug
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
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