Improper Neutralization of Special Elements Used in a Template Engine in Event management and registration - CVE-2026-77129
Published: August 26, 2026
Vulnerability identifier: #VU145511
CSH Severity: Medium
CVSS v4: 7.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-77129
CWE-ID: CWE-1336
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to the affected extension passes an editor-configurable email subject string directly into a Fluid template source without restriction. A remote user can supply Fluid ViewHelper syntax in this field to disclose sensitive data or execute TypoScript content objects.
Affected software
Event management and registration
How to mitigate CVE-2026-77129
Install updates from vendor's website.
Event management and registration - addressed in versions 5.9.3, 6.7.2, 7.9.3, 8.6.2, 9.0.3