TYPO3-CORE-SA-2017-004: Cross-Site Scripting in TYPO3 CMS Backend
September 05, 2017
It has been discovered, that TYPO3 CMS is vulnerable to Cross-Site Scripting.
Component Type: TYPO3 CMS
Release Date: September 5, 2017
Vulnerability Type: Cross-Site Scripting
Affected Versions: 8.0.0 to 8.7.4
Suggested CVSS v2.0: AV:N/AC:L/Au:S/C:P/I:P/A:N/E:F/RL:OF/RC:C
CVE: not assigned yet
Problem Description: Failing to properly encode user input, backend forms are vulnerable to Cross-Site Scripting. A valid backend user account is needed to exploit this vulnerability.
Solution: Update to TYPO3 version 8.7.5 that fixes the problem described.
Credits: Thanks to TYPO3 core and security team member Georg Ringer who reported and fixed the issue.
General Note: All security related code changes are tagged so that you can easily look them up on our review system.