listmonk vulnerabilities

Listmonk prior to version 6.2.0 contains an SQL injection vulnerability in the GET /api/subscribers/export endpoint. The user-controlled query parameter is passed to QuerySubscribersForExport without validation, allowing an authenticated user with appropriate permissions to read arbitrary database tables and execute data-modifying PostgreSQL CTEs.

listmonk from version 4.1.0 to before 6.1.0 has a session management vulnerability that allows previously issued authenticated sessions to remain valid after password reset or change. An attacker with a valid session cookie can retain access to the account even after the victim changes their password.

listmonk versions 4.1.0 to before 6.1.0 have bugs in list permission checks that allow users in a multi-user environment to access lists they don't have permission to. This only affects multi-user environments with untrusted users.

listmonk is a standalone, self-hosted, newsletter and mailing list manager. In versions up to and including 1.1.0, every http request in addition to the session cookie 'session' there included 'nonce'. The value is not checked and validated by the backend, removing 'nonce' allows the requests to be processed correctly. This may seem harmless, but if chained to other vulnerabilities it can become a critical vulnerability. Cross-site request forgery and cross-site scripting chained together can result in improper admin account creation. As of time of publication, no patched versions are available.