CVE-2026-77144: TYPO3 Extension Events 2

High severity, CVSS 7.1. EPSS: 0.4% chance of exploitation in the next 30 days.

The frontend management plugin attributed a newly created event to the submitting user's organizer record only when the request supplied no organizer of its own. The accompanying permission check confirmed only that the submitting user held any organizer role. A user with frontend event management access could therefore create an event that is attributed to another organizer.

Affected products

• TYPO3 Extension Events 2: from 10.0.0, before 10.2.12 (fixed in 10.2.12); from 9.0.0, before 9.4.2 (fixed in 9.4.2); before 8.6.3 (fixed in 8.6.3)

Published 2026-08-25. Last modified 2026-09-28.