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fix(lib): ensure issued challenges don't get double-spent (#1003)

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* fix(lib): ensure issued challenges don't get double-spent

Closes #1002

TL;DR: challenge IDs were not validated at time of token issuance. A
dedicated attacker could solve a challenge once and reuse it across
multiple sessons in order to mint additional tokens.

With the advent of store based challenge issuance in #749, this means
that these challenge IDs are only good for 30 minutes. Websites using
the most recent version of Anubis have limited exposure to this problem.

Websites using older versions of Anubis have a much more increased
exposure to this problem and are encouraged to keep this software
updated as often and as frequently as possible.

* docs: update CHANGELOG

Signed-off-by: Xe Iaso <me@xeiaso.net>

---------

Signed-off-by: Xe Iaso <me@xeiaso.net>
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Xe Iaso 2025-08-20 12:33:32 -04:00 • committed by GitHub
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.github/actions/spelling/expect.txt vendored
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tagline
tarballs
tarrif
taviso
tbn
tbr
techaro