In the Ban List plugin 1.0 for MyBB, any forum user with mod privileges can ban users and input an XSS payload into the ban reason, which is executed on the bans.php page.
https://www.exploit-db.com/exploits/46347
Source: Mitre, NVD
Published: 2019-03-21
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: 0.00062