TYPO3 CMS: Frontend Event Management Permission Bypass Allows Tampering
CVE-2026-77145 Published on August 25, 2026

Broken Access Control in extension "Events 2" (events2)
The permission check for the frontend management update flow verified a different event than the one the request went on to modify. A user with frontend event management access could therefore modify events belonging to other organizers.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2026-77145 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
LOW
User Interaction:
NONE

Weakness Type

What is an Insecure Direct Object Reference / IDOR Vulnerability?

The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

CVE-2026-77145 has been classified to as an Insecure Direct Object Reference / IDOR vulnerability or weakness.


Affected Versions

TYPO3 Extension "Events 2":