MEDIUM
A reflected XSS vulnerability in index.php in MyBB 1.8.x through 1.8.19 allows remote attackers to inject JavaScript via the 'upsetting[bburl]' parameter
Published Apr 11, 2019
6.1
MEDIUMCVSS 3.0
EPSS 0.78%
Description
A reflected XSS vulnerability in index.php in MyBB 1.8.x through 1.8.19 allows remote attackers to inject JavaScript via the 'upsetting[bburl]' parameter.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
6.1 MEDIUM NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Changed
Confidentiality Impact Low
Integrity Impact Low
Availability Impact None
4.3 MEDIUM NVD
AV:N/AC:M/Au:N/C:N/I:P/A:N
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact Partial
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
0.78% 0.00780
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
EPSS probability 0.00780
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 2, 2026 | 0.78% (0.00780) | 54.33th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.78% (0.00780) | 54.39th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.12% (0.00124) | 47.39th | v3 (v2023.03.01) |
| Jun 14, 2024 | 0.12% (0.00124) | 47.08th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.12% (0.00124) | 45.06th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.05% (0.01055) | 52.13th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.05% (0.01055) | 27.52th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.78% (0.00785) | 22.12th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.78% (0.00785) | 0.00th | v1 |
Weaknesses (1)
References (2)
- https://blog.mybb.com/ x_refsource_CONFIRMRelease NotesVendor Advisory
- https://mybb.com/versions/1.8.20/ x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://blog.mybb.com/ | x_refsource_CONFIRMRelease NotesVendor Advisory | |
| https://mybb.com/versions/1.8.20/ | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Apr 11, 2019
Updated Aug 5, 2024
Reserved Nov 12, 2018
Link CVE-2018-19202
CISA Vulnrichment
Updated n/a