Cross Site Scripting in extension "gkh RSS Import" (gkh_rss_import)

Categories: Development Created by Torben Hansen
It has been discovered that the extension "gkh RSS Import" (gkh_rss_import) is susceptible to Cross Site Scripting.
  • Release Date: May 07, 2019
  • Component Type: Third party extension. This extension is not a part of the TYPO3 default installation.
  • Vulnerability Type: Cross Site Scripting
  • Affected Versions: 5.0.0 and below
  • Severity: Medium
  • Suggested CVSS v3.0: AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
  • CVE: not assigned yet

Problem Description

The extension fails to properly encode user input for output in HTML context.


Versions of this extension that are known to be vulnerable will no longer be available for download from the TYPO3 Extension Repository. The extension author does not maintain the extension any more and will not provide a security fix for the reported vulnerability. 

Please uninstall and delete the extension folder from your installation.


Credits go to Melanie Kalka who discovered and reported the vulnerability.

General Advice

Follow the recommendations that are given in the TYPO3 Security Guide. Please subscribe to the typo3-announce mailing list.