CVE-2017-16781
The installer in MyBB before 1.8.13 has XSS.
5.4 MediumPublic exploit
The installer in MyBB before 1.8.13 has XSS.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
1.58%Down 1.2 points since Apr 14, 2021
What each source reports
NVD Score used
The installer in MyBB before 1.8.13 has XSS.
- Record
CVE-2017-16781- CVSS 3.0
- 5.4 Medium
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 3.5 Low
AV:N/AC:M/Au:S/C:N/I:P/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
CVE List No score
The installer in MyBB before 1.8.13 has XSS.
- Record
CVE-2017-16781- Updated
- 2026-11-02
EUVDEUVD-2017-7960 No score
The installer in MyBB before 1.8.13 has XSS.
- Record
EUVD-2017-7960- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-5324-g7hp-c439
The installer in MyBB before 1.8.13 has XSS.
The installer in MyBB before 1.8.13 has XSS.
- Record
GHSA-5324-g7hp-c439- CVSS 3.0
- 5.4 Medium
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | MyBB 1.8.13 - Cross-Site Scripting | 2017-11-11 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2017-16781 is a medium vulnerability (CVSS 5.4) in Mybb, published November 10, 2017. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 1.58%, the 75th percentile. No source names a fixed version.