For Debian 11 bullseye, this problem has been fixed in version
2.1.0-1+deb11u1.
(Similar update for debian 12 bookworm is currently being processed.)
We recommend that you upgrade your djoser packages.
For the detailed security status of djoser please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/djoser
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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