CVE-2017-17454

Name: CVE-2017-17454
Creator: NVD / NIST
Published: 2018-02-20T22:29:00.223+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.72%

Last modified Jun 17, 2026

CVE-2017-17454 is a vulnerability of currently unknown severity. 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. EPSS estimates a 0.72% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

0.72%

49.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Mahara	Mahara	>= 16.10.0, < 16.10.7
Mahara	Mahara	>= 17.04.0, < 17.04.5
Mahara	Mahara	>= 17.10.0, < 17.10.2

References

https://bugs.launchpad.net/mahara/+bug/1732987Third Party Advisory
https://mahara.org/interaction/forum/topic.php?id=8149Vendor Advisory
https://reviews.mahara.org/#/c/8191/Vendor Advisory
https://bugs.launchpad.net/mahara/+bug/1732987Third Party Advisory
https://mahara.org/interaction/forum/topic.php?id=8149Vendor Advisory
https://reviews.mahara.org/#/c/8191/Vendor Advisory

Timeline

Published: Feb 20, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-17454?

How severe is CVE-2017-17454?

Severity scoring for CVE-2017-17454 is pending analysis. The EPSS model estimates a 0.72% probability of exploitation in the next 30 days.

How do I fix CVE-2017-17454?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-17454?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST