Insufficient Type Distinction Affecting typo3/cms-form package, versions >=14.2.0, <14.3.5
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PHP-TYPO3CMSFORM-17971197
- published14 Jul 2026
- disclosed14 Jul 2026
- creditUnknown
Introduced: 14 Jul 2026
NewCVE-2026-15305 (opens in a new tab)How to fix?
Upgrade typo3/cms-form to version 14.3.5 or higher.
Overview
typo3/cms-form is a Form Library, Plugin and Editor
Affected versions of this package are vulnerable to Insufficient Type Distinction via the FileUpload or ImageUpload elements when allowedMimeTypes is configured. An attacker can upload files with arbitrary MIME types by bypassing server-side validation due to the MimeTypeValidator not being properly registered during form processing.