CVE-2017-16780
The installer in MyBB before 1.8.13 allows remote attackers to execute arbitrary code by writing to the configuration file.
Does this matter?
A public exploit is published in Exploit-DB (verified) and the impact is critical, while EPSS rates exploitation at 5.8%. Anyone can run this; patch or mitigate before the next change window and check exposed instances for signs of use.
Description
The installer in MyBB before 1.8.13 allows remote attackers to execute arbitrary code by writing to the configuration file.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 5.77% probability · 93th percentile
- Public exploits
- 1 in Exploit-DB · verified · first 11 November 2017
- CISA KEV
- Not listed
- Weakness
- CWE-352
- Affected
- mybb/mybb
- Source
- cve@mitre.org
EPSS moved from 4.6% on 21 September 2026 to 5.8% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
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/43136/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/43136/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.