Server-Side Template Injection in extension "Event management and registration" (sf_event_mgt)

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-77129
StatePUBLISHED
AssignerTYPO3
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-25 09:17:33 UTC
Updated2026-08-25 14:16:54 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v4.0 7.7 HIGH from f4fb688c-4412-4426-b4b8-421ecf27b14a

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.002340000 probability, percentile 0.140690000 (date 2026-08-25)

Problem Types: CWE-1336 | CWE-1336 CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine

VersionSourceTypeScoreSeverityVector
4.0f4fb688c-4412-4426-b4b8-421ecf27b14aSecondary7.7HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/C...
4.0CNACVSS7.7HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
Low
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA TYPO3 Extension Event Management And Registration affected 9.0.0 9.0.3 semver Not specified
CNA TYPO3 Extension Event Management And Registration affected 8.0.0 8.6.2 semver Not specified
CNA TYPO3 Extension Event Management And Registration affected 7.0.0 7.9.3 semver Not specified
CNA TYPO3 Extension Event Management And Registration affected 6.0.0 6.7.2 semver Not specified
CNA TYPO3 Extension Event Management And Registration affected 5.9.3 semver Not specified

References

ReferenceSourceLinkTags
typo3.org/security/advisory/typo3-ext-sa-2026-023 f4fb688c-4412-4426-b4b8-421ecf27b14a typo3.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Torben Hansen (en)

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report