CVE-2021-38295

In Apache CouchDB, a malicious user with permission to create documents in
a database is able to attach a HTML attachment to a document. If a CouchDB
admin opens that attachment in a browser, e.g. via the CouchDB admin
interface Fauxton, any JavaScript code embedded in that HTML attachment
will be executed within the security context of that admin. A similar route
is available with the already deprecated _show and _list functionality.
This privilege escalation vulnerability allows an attacker to add or remove
data in any database or make configuration changes. This issue affected
Apache CouchDB prior to 3.1.2