CVE-2017-14251: TYPO3

High severity, CVSS 8.8. EPSS: 2.3% chance of exploitation in the next 30 days.

Unrestricted File Upload vulnerability in the fileDenyPattern in sysext/core/Classes/Core/SystemEnvironmentBuilder.php in TYPO3 7.6.0 to 7.6.21 and 8.0.0 to 8.7.4 allows remote authenticated users to upload files with a .pht extension and consequently execute arbitrary PHP code.

Affected products

• TYPO3 TYPO3: version 7.6.0 only; version 7.6.1 only; version 7.6.2 only; version 7.6.3 only; version 7.6.4 only; version 7.6.5 only; …

Published 2017-09-11. Last modified 2026-06-17.