CRITICAL
MyBB (aka MyBulletinBoard) before 1.8.7 and MyBB Merge System before 1.8.7 allow attackers to have unspecified impact via vectors related to low adminsid and sid entropy
Published Jan 31, 2017
9.8
CRITICALCVSS 3.0
EPSS 2.17%
Description
MyBB (aka MyBulletinBoard) before 1.8.7 and MyBB Merge System before 1.8.7 allow attackers to have unspecified impact via vectors related to low adminsid and sid entropy.
Affected products
No data.
OR
- ≤ 1.8.6
- ≤ 1.8.6
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
9.8 CRITICAL NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
7.5 HIGH NVD
AV:N/AC:L/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
2.17% 0.02168
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.02168
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 (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.17% (0.02168) | 81.59th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.17% (0.02168) | 79.83th | v5 (v2026.06.15) |
| Mar 30, 2025 | 2.85% (0.02853) | 84.99th | v4 (v2025.03.14) |
| Mar 29, 2025 | 4.37% (0.04366) | 81.24th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.12% (0.02120) | 82.96th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.48% (0.00476) | 76.53th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.48% (0.00476) | 75.00th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.48% (0.00476) | 71.96th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.02% (0.01018) | 38.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.02% (0.01018) | 36.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | 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/94395 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://blog.mybb.com/2016/03/11/mybb-1-8-7-merge-system-1-8-7-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/94395 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://blog.mybb.com/2016/03/11/mybb-1-8-7-merge-system-1-8-7-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-2016-9412
CISA Vulnrichment
Updated n/a