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.

published 2019-03-11 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-19017

cvss: 6.1; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 3.4%; EPSS 3.4% chance of exploitation in 30 days, percentile 88%
public exploits: 1; Exploit-DB

Patch / fix

fixed in 1 links 1

upcoming_events_project upcoming_events 1.33

github.com/vintagedaddyo/MyBB_Plugin-Upcoming_Events#1 commit

Timeline

2019-03-11 Published
2019-03-19 First public exploit (EDB-46558)

Exploit prediction

3.39% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

EDB-46558 MyBB Upcoming Events Plugin 1.32 - Cross-Site Scripting webapps, 2019-03-19
packetstormsecurity.com http://packetstormsecurity.com/files/152152/MyBB-Upcoming-Events-1.32-Cross-Site-Scripting.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.0	6.1	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /vintagedaddyo/MyBB_Plugin-Upcoming_Events/pull/1/commits/d0a0e1c6e56f248613e0150344ebea8764bba5fa
patch, third-party-advisory
exploit-db.com /exploits/46558/
exploit, third-party-advisory, vdb-entry
packetstormsecurity.com /files/152152/MyBB-Upcoming-Events-1.32-Cross-Site-Scripting.html
exploit, third-party-advisory, vdb-entry
community.mybb.com /mods.php?action=changelog&pid=1231
release-notes, third-party-advisory

Sources

CVE List CVE-2019-9650
NVD CVE-2019-9650

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary