CVE-2026-77129
Received
Received - Intake
Fluid Template Injection in TYPO3 Event Registration Extension
Vulnerability report for CVE-2026-77129, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-08-25
Last updated on: 2026-08-25
Assigner: TYPO3
Description
Description
The extension passes an editor-configurable email subject string directly into a Fluid template source without restriction. A backend user with edit access to the event plugin or Backend Module can supply Fluid ViewHelper syntax in this field to disclose sensitive data or execute TypoScript content objects. Exploitation of this issue requires an authenticated backend account with edit access to the event registration plugin or backend module.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| typo3 | sf_event_mgt | to 5.9.3 (exc) |
| typo3 | sf_event_mgt | From 6.0.0 (inc) to 6.7.2 (exc) |
| typo3 | sf_event_mgt | to 6.7.2 (exc) |
| typo3 | sf_event_mgt | From 7.0.0 (inc) to 7.9.3 (exc) |
| typo3 | sf_event_mgt | to 7.9.3 (exc) |
| typo3 | sf_event_mgt | From 8.0.0 (inc) to 8.6.2 (exc) |
| typo3 | sf_event_mgt | to 8.6.2 (exc) |
| typo3 | sf_event_mgt | From 9.0.0 (inc) to 9.0.3 (exc) |
| typo3 | sf_event_mgt | to 9.0.3 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-1336 | The product uses a template engine to insert or process externally-influenced input, but it does not neutralize or incorrectly neutralizes special elements or syntax that can be interpreted as template expressions or other code directives when processed by the engine. |
