CVE-2018-17128
A Persistent XSS issue was discovered in the Visual Editor in MyBB before 1.8.19 via a Video MyCode.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 74.8%, higher than 100% of all known CVEs. Patch or mitigate before the next change window.
Description
A Persistent XSS issue was discovered in the Visual Editor in MyBB before 1.8.19 via a Video MyCode.
- 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
- 74.75% probability · 100th percentile
- Public exploits
- 1 in Exploit-DB · first 24 September 2018
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- mybb/mybb
- Source
- cve@mitre.org
EPSS moved from 48.8% on 21 September 2026 to 74.8% 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/2018/09/11/mybb-1-8-19-released-security-maintenance-release/Release Notes, Vendor Advisory
- https://www.exploit-db.com/exploits/45449/Exploit, Third Party Advisory, VDB Entry
- https://blog.mybb.com/2018/09/11/mybb-1-8-19-released-security-maintenance-release/Release Notes, Vendor Advisory
- https://www.exploit-db.com/exploits/45449/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.