In Kanboard before 1.0.47, by altering form data, an authenticated user can edit tasks of a private project of another user.Referenceshttps://github.com/kanboard/kanboard/commit/074f6c104f3e49401ef0065540338fc2d4be79f0http://openwall.com/lists/oss-security/2017/10/04/9https://kanboard.net/news/version-1.0.47https://github.com/kanboard/kanboard/commit/3e0f14ae2b0b5a44bd038a472f17eac75f538524
