CVE-2026-77145: CWE-639 Authorization Bypass Through User-Controlled Key in TYPO3 Extension "Events 2"
CVE-2026-77145 is a high-severity authorization bypass vulnerability in the TYPO3 Extension "Events 2". The flaw occurs because the permission check verifies a different event than the one actually modified by the request. This allows a user with frontend event management access to modify events belonging to other organizers without proper authorization.
AI Analysis
Technical Summary
The TYPO3 Extension "Events 2" contains an authorization bypass vulnerability (CWE-639) where the permission check for the frontend management update flow validates a different event than the one the request modifies. This discrepancy enables users with frontend event management privileges to alter events that belong to other organizers, violating access control policies. The vulnerability affects version 10.0.0 and all versions from 10.0.0 up to but not including 10.2.12. No official patch or remediation level has been published by the vendor as of the data provided.
Potential Impact
An attacker with frontend event management access can modify events they do not own, potentially leading to unauthorized changes in event data. This could undermine event integrity and trust in the system's access controls. The CVSS 4.0 base score is 7.1, indicating a high severity impact due to network attack vector, low attack complexity, no user interaction, and high impact on integrity and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict frontend event management access to trusted users only and monitor for suspicious activity related to event modifications.
CVE-2026-77145: CWE-639 Authorization Bypass Through User-Controlled Key in TYPO3 Extension "Events 2"
Description
CVE-2026-77145 is a high-severity authorization bypass vulnerability in the TYPO3 Extension "Events 2". The flaw occurs because the permission check verifies a different event than the one actually modified by the request. This allows a user with frontend event management access to modify events belonging to other organizers without proper authorization.
CVSS v4.0
Score 7.1high
Affected software
pkg:composer/jweiland/events2Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The TYPO3 Extension "Events 2" contains an authorization bypass vulnerability (CWE-639) where the permission check for the frontend management update flow validates a different event than the one the request modifies. This discrepancy enables users with frontend event management privileges to alter events that belong to other organizers, violating access control policies. The vulnerability affects version 10.0.0 and all versions from 10.0.0 up to but not including 10.2.12. No official patch or remediation level has been published by the vendor as of the data provided.
Potential Impact
An attacker with frontend event management access can modify events they do not own, potentially leading to unauthorized changes in event data. This could undermine event integrity and trust in the system's access controls. The CVSS 4.0 base score is 7.1, indicating a high severity impact due to network attack vector, low attack complexity, no user interaction, and high impact on integrity and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict frontend event management access to trusted users only and monitor for suspicious activity related to event modifications.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- TYPO3
- Date Reserved
- 2026-08-20T13:10:15.962Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a8d5b66acd9273b49f365d5
Added to database: 08/25/2026, 09:07:50 UTC
Last enriched: 08/25/2026, 09:22:11 UTC
Last updated: 08/25/2026, 09:22:11 UTC
Views: 5
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