Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Prior to 3.7.2, Joplin Server's UserModel.ssoLogin() returns an existing account matched by an IdP-asserted email without checking the account's is_external flag. In deployments using mixed local and SAML authentication, an attacker whose IdP session can assert a local user's email can pass POST /api/saml, receive a session for that local account, and access or modify the victim's notes, files, and settings without knowing the local password. This issue is fixed in version 3.7.2.

Ein Angreifer kann mehrere Schwachstellen in Joplin ausnutzen, um Benutzerkonten zu übernehmen, erweiterte Berechtigungen zu erlangen, Sicherheitsmaßnahmen zu umgehen, beliebigen Code auszuführen, Daten offenzulegen oder zu manipulieren oder Cross-Site-Scripting-Angriffe durchzuführen.