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
Published Feb 20, 2018
5.4
MEDIUMCVSS 3.0
EPSS 0.69%
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.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
AV:N/AC:M/Au:S/C:N/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.69% (0.00692) | 51.13th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.69% (0.00692) | 51.43th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.07% (0.00071) | 31.36th | v3 (v2023.03.01) |
| Jun 14, 2024 | 0.07% (0.00071) | 30.94th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.07% (0.00071) | 28.94th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00890) | 30.33th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00890) | 12.04th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.83% (0.00833) | 24.58th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.83% (0.00833) | 0.00th | v1 |
References (3)
- https://bugs.launchpad.net/mahara/+bug/1732987 x_refsource_MISCThird Party Advisory
- https://mahara.org/interaction/forum/topic.php?id=8149 x_refsource_CONFIRMVendor Advisory
- https://reviews.mahara.org/#/c/8191/ x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://bugs.launchpad.net/mahara/+bug/1732987 | x_refsource_MISCThird Party Advisory | |
| https://mahara.org/interaction/forum/topic.php?id=8149 | x_refsource_CONFIRMVendor Advisory | |
| https://reviews.mahara.org/#/c/8191/ | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.