An issue was discovered in Centreon Web through 19.04.3. When a user changes his password on his profile page, the contact_autologin_key field in the database becomes blank when it should be NULL. This makes it possible to partially bypass authentication.
https://github.com/centreon/centreon/pull/8072
https://documentation.centreon.com/docs/centreon/en/latest/release_notes/centreon-19.10.html
https://documentation.centreon.com/docs/centreon/en/latest/release_notes/centreon-19.04.html