CVE 2013-4432
Mahara before 1.5.13, 1.6.x before 1.6.8, and 1.7.x before 1.7.4 does not properly restrict access to folders, which allows remote authenticated users to read arbitrary folders (1) by leveraging an active folder tab loaded before permissions were removed or (2) via the folder parameter to artefact/
See the 
CVE page on Mitre.org
for more details.
