An XSS issue was discovered in upcoming_events.php in the Upcoming Events plugin before 1.33 for MyBB via a crafted name for an event.
https://github.com/vintagedaddyo/MyBB_Plugin-Upcoming_Events/pull/1/commits/d0a0e1c6e56f248613e0150344ebea8764bba5fa
https://community.mybb.com/mods.php?action=changelog&pid=1231
https://www.exploit-db.com/exploits/46558/
http://packetstormsecurity.com/files/152152/MyBB-Upcoming-Events-1.32-Cross-Site-Scripting.html
Source: Mitre, NVD
Published: 2019-03-11
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: 0.04482