CVE-2026-15305Medium▾ SunlitTYPO3 CMS - Unrestricted File Upload in Form Framework
▾ Sunlit zone — Low / medium · no exploitation signal
impact 27.5 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 31.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via GHSA
0.3%
Users were able to upload files with arbitrary MIME types to forms using FileUpload or ImageUpload elements with allowedMimeTypes configured - uploading PHP files was not possible. The restriction was not enforced server-side because the MimeTypeValidator was registered during form building before concrete form definition properties were applied, resulting in the validator never being added to the processing pipeline.
Update to TYPO3 version 14.3.5 LTS that fixes the problem described.
Thanks to Sébastien Convers for reporting this issue, and to Josua Vogel and Oliver Hader for fixing it.
typo3/cms-form >= 14.2.0, <= 14.3.4Upgrade to a patched release:
typo3/cms-form 14.3.5Connected by shared product, vendor, weakness, or advisory.
CVE-2026-19418HighTYPO3 CMS - Broken Access Control in Backend and Install Tool
CVE-2026-47344LowTYPO3 HTML Sanitizer allows Cross-site Scripting
CVE-2026-47348MediumTYPO3 CMS has Cross-Site Scripting in Indexed Search
CVE-2026-47351MediumTYPO3 CMS: Broken Access Control in Media Module
CVE-2026-47352MediumTYPO3 CMS has Broken Access Control in Backend API
CVE-2026-49738LowTYPO3 CMS has Broken Access Control in its File Abstraction Layer