CVE-2017-16781
The installer in MyBB before 1.8.13 has XSS.
Does this matter?
A public exploit is published in Exploit-DB (verified), so the technical barrier is gone even though the severity is medium and EPSS is 1.6%. Treat it as high on anything reachable from the internet.
Description
The installer in MyBB before 1.8.13 has XSS.
- CVSS 3.0
- 5.4 MEDIUMCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 1.58% probability · 75th percentile
- Public exploits
- 1 in Exploit-DB · verified · first 11 November 2017
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- mybb/mybb
- Source
- cve@mitre.org
EPSS 1.6% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- https://blog.mybb.com/2017/11/07/mybb-1-8-13-released-security-maintenance-release/Release Notes, Vendor Advisory
- https://www.exploit-db.com/exploits/43137/Exploit, Third Party Advisory, VDB Entry
- https://blog.mybb.com/2017/11/07/mybb-1-8-13-released-security-maintenance-release/Release Notes, Vendor Advisory
- https://www.exploit-db.com/exploits/43137/Exploit, Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.