LedgerSMB does not check the origin of HTML fragments merged into the browser's DOM. By sending a specially crafted URL to an authenticated user, this flaw can be abused for remote code execution and information disclosure.
https://www.debian.org/security/2021/dsa-4962
https://ledgersmb.org/cve-2021-3693-cross-site-scripting
https://huntr.dev/bounties/daf1384d-648a-43fd-9b35-5c37d8ead667