Cross-site scripting (XSS) vulnerability in the Admin control panel in MyBB (aka MyBulletinBoard) before 1.8.7 and MyBB Merge System before 1.8.7 might allow remote attackers to inject arbitrary web script or HTML via vectors involving pruning logs.
http://www.securityfocus.com/bid/94395
http://www.openwall.com/lists/oss-security/2016/11/18/1
http://www.openwall.com/lists/oss-security/2016/11/10/8
https://euvd.enisa.europa.eu/vulnerability/EUVD-2016-10219
https://blog.mybb.com/2016/03/11/mybb-1-8-7-merge-system-1-8-7-release/
Source: Mitre, NVD
Published: 2017-01-31
Updated: 2026-06-17
Base Score: 4.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N
Severity: Medium
Base Score: 6.1
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS: 0.01273