HIGH
MyBB (aka MyBulletinBoard) before 1.8.8 on Windows and MyBB Merge System before 1.8.8 on Windows allow remote attackers to overwrite arbitrary CSS files via vectors related to "style import."
Published Jan 31, 2017
7.5
HIGHCVSS 3.0
EPSS 1.86%
Description
MyBB (aka MyBulletinBoard) before 1.8.8 on Windows and MyBB Merge System before 1.8.8 on Windows allow remote attackers to overwrite arbitrary CSS files via vectors related to "style import."
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
7.5 HIGH NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact High
Availability Impact None
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:P/A:N
Access Vector Network
Access Complexity Low
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.
1.86% 0.01861
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.01861
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.86% (0.01861) | 78.48th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.86% (0.01861) | 76.43th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.92% (0.00919) | 74.33th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.33% (0.00333) | 72.02th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.33% (0.00333) | 70.37th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.33% (0.00333) | 66.53th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.21% (0.01213) | 66.61th | v2 (v2022.01.01) |
| Feb 17, 2023 | 1.21% (0.01213) | 66.22th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.21% (0.01213) | 64.21th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.21% (0.01213) | 40.54th | v2 (v2022.01.01) |
Weaknesses (1)
References (4)
- http://www.openwall.com/lists/oss-security/2016/11/10/8 mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/11/18/1 mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory
- http://www.securityfocus.com/bid/94396 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://blog.mybb.com/2016/10/17/mybb-1-8-8-merge-system-1-8-8-release/ x_refsource_CONFIRMPatchRelease NotesVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2016/11/10/8 | mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory | |
| http://www.openwall.com/lists/oss-security/2016/11/18/1 | mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory | |
| http://www.securityfocus.com/bid/94396 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://blog.mybb.com/2016/10/17/mybb-1-8-8-merge-system-1-8-8-release/ | x_refsource_CONFIRMPatchRelease NotesVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Jan 31, 2017
Updated Aug 6, 2024
Reserved Nov 17, 2016
Link CVE-2016-9415
CISA Vulnrichment
Updated n/a