The New Threads plugin before 1.2 for MyBB has XSS.
https://www.exploit-db.com/exploits/45057/
https://community.mybb.com/mods.php?action=changelog&pid=1143
Source: Mitre, NVD
Published: 2018-07-19
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: 0.48557