CVE-2015-5956: TYPO3

Low severity, CVSS 3.5. EPSS: 2% chance of exploitation in the next 30 days.

The sanitizeLocalUrl function in TYPO3 6.x before 6.2.15, 7.x before 7.4.0, 4.5.40, and earlier allows remote authenticated users to bypass the XSS filter and conduct cross-site scripting (XSS) attacks via a base64 encoded data URI, as demonstrated by the (1) returnUrl parameter to show_rechis.php and the (2) redirect_url parameter to index.php.

Affected products

• TYPO3 TYPO3: up to and including 4.5.40; version 6.0 only; version 6.0.1 only; version 6.0.2 only; version 6.0.3 only; version 6.0.4 only; …

Published 2015-09-16. Last modified 2026-06-17.