CVE-2017-17454: Mahara

Medium severity, CVSS 5.4. EPSS: 0.7% chance of exploitation in the next 30 days.

Mahara 16.10 before 16.10.7 and 17.04 before 17.04.5 and 17.10 before 17.10.2 have a Cross Site Scripting (XSS) vulnerability when a user enters invalid UTF-8 characters. These are now going to be discarded in Mahara along with NULL characters and invalid Unicode characters. Mahara will also avoid direct $_GET and $_POST usage where possible, and instead use param_exists() and the correct param_*() function to fetch the expected value.

Affected products

• Mahara Mahara: from 16.10.0, before 16.10.7 (fixed in 16.10.7); from 17.04.0, before 17.04.5 (fixed in 17.04.5); from 17.10.0, before 17.10.2 (fixed in 17.10.2)

Published 2018-02-20. Last modified 2026-06-17.