The Recent Threads plugin before 1.1 for MyBB allows XSS via a thread subject.
https://community.mybb.com/mods.php?action=changelog&pid=842
https://www.exploit-db.com/exploits/44833/
Source: Mitre, NVD
Published: 2018-06-04
Updated: 2026-06-17
Base Score: 3.5
Vector: CVSS2#AV:N/AC:M/Au:S/C:N/I:P/A:N
Severity: Low
Base Score: 5.4
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Severity: Medium
EPSS: 0.00189