What’s Vulnerable › Vulnerabilities
CVE-2026-77129: Server-Side Template Injection in extension "Event management and registration" (sf_event_mgt)
- Severity: high (CVSS 7.7 v4.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-25 · updated 2026-08-26
- Weakness: CWE-1336
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.
Affected products
- TYPO3 Extension "Event management and registration": from 9.0.0 before 9.0.3; from 8.0.0 before 8.6.2; from 7.0.0 before 7.9.3; from 6.0.0 before 6.7.2; before 5.9.3 — fixed in 5.9.3, 6.7.2, 7.9.3, 8.6.2, 9.0.3
How to fix
Upgrade to a fixed version: TYPO3 Extension "Event management and registration" 5.9.3, 6.7.2, 7.9.3, 8.6.2. Check the vendor advisory for mitigations.
References
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