In Mahara 21.04 before 21.04.3 and 21.10 before 21.10.1, portfolios created in groups that have not been shared with non-group members and portfolios created on the site and institution levels can be viewed without requiring a login if the URL to these portfolios is known.

In Mahara 20.10 before 20.10.4, 21.04 before 21.04.3, and 21.10 before 21.10.1, the names of folders in the Files area can be seen by a person not owning the folders. (Only folder names are affected. Neither file names nor file contents are affected.)

In Mahara before 20.04.5, 20.10.3, 21.04.2, and 21.10.0, exported CSV files could contain characters that a spreadsheet program could interpret as a command, leading to execution of a malicious string locally on a device, aka CSV injection.

In Mahara before 20.04.5, 20.10.3, 21.04.2, and 21.10.0, the account associated with a web services token is vulnerable to being exploited and logged into, resulting in information disclosure (at a minimum) and often escalation of privileges.