request-tracker4 is vulnerable to information disclosure. The vulnerability exists due to a user enumeration through a timing side-channel attack.
docs.bestpractical.com/release-notes/rt/index.html
github.com/bestpractical/rt/commit/70749bb66cb13dd70bd53340c371038a5f3ca57c
lists.debian.org/debian-lts-announce/2022/06/msg00019.html
lists.fedoraproject.org/archives/list/[email protected]/message/2JK57CEEXLQF7MGBCUX76DZHXML7LUSQ/
security-tracker.debian.org/tracker/CVE-2021-38562