TYPO3-CORE-SA-2015-012: Cross-Site Scripting vulnerability in typolinks

Categories: TYPO3 CMS created by Nicole Cordes
It has been discovered, that TYPO3 is susceptible to Cross-Site Scripting
Component Type: TYPO3 CMS Release Date: December 15, 2015 Vulnerability Type: Cross-Site Scripting Affected Versions: Versions 6.2.0 to 6.2.15, 7.0.0 to 7.6.0 Severity: Low Suggested CVSS v2.0: AV:N/AC:L/Au:S/C:N/I:P/A:N/E:F/RL:O/RC:C CVE: not assigned yet Problem Description: All link fields within the TYPO3 installation are vulnerable to Cross-Site Scripting as authorized editors can insert javascript commands by using the url scheme "javascript:". Solution: Update to TYPO3 versions 6.2.16 or 7.6.1 that fix the problem described. By default now the typoLink() function disables the insecure url scheme "javascript:". Important note: If your TYPO3 installation is in need of that prefix you can re-enable the old behaviour by installing the extension javascript_handler. Credits: Thanks to Oliver Hader who discovered and reported the issues. General Advice: Follow the recommendations that are given in the TYPO3 Security Guide. Please subscribe to the typo3-announce mailing list. General Note: All security related code changes are tagged so that you can easily look them up on our review system.