XSS in Mahara
CVE-2017-17454
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.007 (51.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
Weakness classification (CWE)
References
- mahara.org/interaction/forum/topic.php (Vendor Advisory)
- reviews.mahara.org/ (Vendor Advisory)
- bugs.launchpad.net/mahara/+bug/1732987 (Third Party Advisory)
Frequently asked questions
- What is CVE-2017-17454?
- CVE-2017-17454 is a medium-severity vulnerability in Mahara, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2018-02-20.
- How severe is CVE-2017-17454?
- Medium severity. CVSS v3 base score is 5.4 out of 10.