Arbitrary Code Execution in extension "MK Forms" (mkforms)
It has been discovered that the extension "MK Forms" (mkforms) is susceptible to Arbitrary Code Execution
Release Date: September 30, 2015
Component Type: Third party extension. This extension is not a part of the TYPO3 default installation.
Affected Versions: version 1.0.23 and below
Vulnerability Type: Arbitrary Code Execution
Severity: High
Suggested CVSS v2.0: AV:N/AC:L/Au:N/C:C/I:C/A:C/E:F/RL:O/RC:C (What's that?)
CVE: not assigned yet
Problem Description: The extension fails to delete uploaded, invalid files which can be executed by knowing the upload folder.
Solution: An updated version 1.0.24 is available from the TYPO3 Extension Manager and at http://typo3.org/extensions/repository/download/mkforms/1.0.24/t3x/. Users of the extension are advised to update the extension as soon as possible.
Credits: Credits go to Hannes Bochmann who discovered and reported the issue.
General advice: Follow the recommendations that are given in the TYPO3 Security Guide. Please subscribe to the typo3-announce mailing list to receive future Security Bulletins via E-mail.