Component Type: TYPO3 CMS
Release Date: April 12, 2016
Vulnerable subcomponent: Form
Vulnerability Type: Arbitrary File Disclosure
Affected Versions: Versions 6.2.0 to 6.2.19
Severity: High
Suggested CVSS v2.0: AV:N/AC:L/Au:S/C:C/I:N/A:N/E:P/RL:O/RC:C
CVE: not assigned yet
Problem Description: Failing to properly validate user input, the form component is susceptible to Arbitrary File Disclosure. A valid backend user account is needed to exploit this vulnerability. Only forms are vulnerable, which contain upload fields.
Solution: Update to TYPO3 versions 6.2.20 that fix the problem described.
Credits: Thanks to Gerrit Venema 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.