In Mahara 21.04 before 21.04.7, 21.10 before 21.10.5, 22.04 before 22.04.3, and 22.10 before 22.10.0, embedded images are accessible without a sufficient permission check under certain conditions.

Mahara 21.04 before 21.04.7, 21.10 before 21.10.5, 22.04 before 22.04.3, and 22.10 before 22.10.0 potentially allow a PDF export to trigger a remote shell if the site is running on Ubuntu and the flag -dSAFER is not set with Ghostscript.

In Mahara 21.04 before 21.04.6, 21.10 before 21.10.4, and 22.04.2, files can sometimes be downloaded through thumb.php with no permission check.

In Mahara before 20.10.5, 21.04.4, 21.10.2, and 22.04.0, a site using Isolated Institutions is vulnerable if more than ten groups are used. They are all shown from page 2 of the group results list (rather than only being shown for the institution that the viewer is a member of).

Mahara before 20.10.5, 21.04.4, 21.10.2, and 22.04.0 allows stored XSS when a particular Cascading Style Sheets (CSS) class for embedly is used, and JavaScript code is constructed to perform an action.

Mahara before 20.10.5, 21.04.4, 21.10.2, and 22.04.0 is vulnerable to Cross Site Request Forgery (CSRF) because randomly generated tokens are too easily guessable.

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.