CVE-2026-77128: CWE-862 Missing Authorization in TYPO3 Extension "Event management and registration"
Description
CVE-2026-77128 is a medium severity vulnerability in the TYPO3 extension "Event management and registration." It involves missing authorization checks that allow an unauthenticated remote user to bypass enable-field restrictions and view hidden or time-restricted events by passing a demand-override parameter. This issue occurs unless the plugin setting disableOverrideDemand is enabled.
CVSS v4.0
Score 6.3medium
Affected software
TYPO3
Extension "Event management and registration"
pkg:composer/derhansen/sf_event_mgtRun 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 "Event management and registration" fails to enforce enable-field restrictions on a repository query parameter. An unauthenticated remote attacker can exploit this by passing a demand-override parameter to view events that are normally hidden or time-restricted. The vulnerability is present in multiple versions of the extension, specifically versions >=0 <5.9.3, >=6.0.0 <6.7.2, >=7.0.0 <7.9.3, >=8.0.0 <8.6.2, and >=9.0.0 <9.0.3. Exploitation requires that the disableOverrideDemand plugin setting is not enabled.
Potential Impact
An unauthenticated remote user can bypass authorization controls to view hidden or time-restricted events. This could lead to unauthorized disclosure of event information that is intended to be restricted. There is no indication of further impact such as code execution or data modification.
Mitigation Recommendations
No official patch or fix is indicated in the provided data. Mitigation involves enabling the disableOverrideDemand plugin setting to prevent the demand-override parameter from bypassing enable-field restrictions. Users should verify this setting is active. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- TYPO3
- Date Reserved
- 2026-08-20T13:10:12.062Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a8d5b63acd9273b49f3656a
Added to database: 08/25/2026, 09:07:47 UTC
Last enriched: 09/10/2026, 20:17:44 UTC
Last updated: 10/10/2026, 18:48:22 UTC
Views: 49
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