MEDIUM
A Persistent XSS issue was discovered in the Visual Editor in MyBB before 1.8.19 via a Video MyCode
Published Sep 17, 2018
5.4
MEDIUMCVSS 3.0
EPSS 74.75%
Description
A Persistent XSS issue was discovered in the Visual Editor in MyBB before 1.8.19 via a Video MyCode.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
5.4 MEDIUM NVD
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction Required
Scope Changed
Confidentiality Impact Low
Integrity Impact Low
Availability Impact None
3.5 LOW NVD
AV:N/AC:M/Au:S/C:N/I:P/A:N
Access Vector Network
Access Complexity Medium
Authentication Single
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.
74.75% 0.74752
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
EPSS probability 0.74752
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (26 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 74.75% (0.74752) | 99.49th | v5 (v2026.06.15) |
| Sep 22, 2026 | 74.75% (0.74752) | 99.48th | v5 (v2026.06.15) |
| Sep 21, 2026 | 48.82% (0.48817) | 98.86th | v5 (v2026.06.15) |
| Sep 6, 2026 | 74.75% (0.74752) | 99.47th | v5 (v2026.06.15) |
| Sep 5, 2026 | 48.82% (0.48817) | 98.83th | v5 (v2026.06.15) |
| Aug 30, 2026 | 74.75% (0.74752) | 99.47th | v5 (v2026.06.15) |
| Aug 28, 2026 | 48.82% (0.48817) | 98.82th | v5 (v2026.06.15) |
| Aug 24, 2026 | 74.75% (0.74752) | 99.46th | v5 (v2026.06.15) |
| Aug 23, 2026 | 48.82% (0.48817) | 98.82th | v5 (v2026.06.15) |
| Jun 15, 2026 | 74.75% (0.74752) | 99.44th | v5 (v2026.06.15) |
| Nov 21, 2025 | 2.00% (0.02005) | 83.12th | v4 (v2025.03.14) |
| Nov 18, 2025 | 0.49% (0.00489) | 62.89th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.83% (0.01833) | 81.74th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.47% (0.00469) | 76.38th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.50% (0.00495) | 75.51th | v3 (v2023.03.01) |
| Aug 9, 2023 | 0.50% (0.00495) | 73.11th | v3 (v2023.03.01) |
| Mar 31, 2023 | 0.55% (0.00549) | 74.02th | v3 (v2023.03.01) |
| Mar 16, 2023 | 29.57% (0.29569) | 96.20th | v3 (v2023.03.01) |
| Mar 7, 2023 | 17.81% (0.17811) | 95.27th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.19% (0.02192) | 81.07th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.19% (0.02192) | 79.25th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.19% (0.02192) | 57.97th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.74% (0.02742) | 63.06th | v1 |
| Jan 6, 2022 | 2.74% (0.02742) | 62.72th | v1 |
| Sep 1, 2021 | 2.74% (0.02742) | 80.38th | v1 |
| Apr 14, 2021 | 2.74% (0.02742) | 0.00th | v1 |
Weaknesses (1)
References (2)
- https://blog.mybb.com/2018/09/11/mybb-1-8-19-released-security-maintenance-release/ x_refsource_MISCRelease NotesVendor Advisory
- https://www.exploit-db.com/exploits/45449/ exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry
| Link | Providers | Tags |
|---|---|---|
| https://blog.mybb.com/2018/09/11/mybb-1-8-19-released-security-maintenance-release/ | x_refsource_MISCRelease NotesVendor Advisory | |
| https://www.exploit-db.com/exploits/45449/ | exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Sep 17, 2018
Updated Aug 5, 2024
Reserved Sep 16, 2018
Link CVE-2018-17128
CISA Vulnrichment
Updated n/a