Open Redirect in extension "Hairu" (hairu)

Categories: Development Created by Torben Hansen
It has been discovered that the extension "Hairu" (hairu) is susceptible to an Open Redirect.
  • Release Date: May 07, 2019
  • Component Type: Third party extension. This extension is not a part of the TYPO3 default installation.
  • Vulnerability Type: Open Redirect
  • Affected Versions: 3.0.0 and below
  • Severity: Medium
  • Suggested CVSS v3.0: AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C
  • CVE: not assigned yet

Problem Description

The extension fails to validate user input for the parameter “redirect_url”, which allows a redirect to an arbitrary URL after a successful user login.


An updated version 3.0.1  is available from the TYPO3 extension manager and at 
Users of the extension are advised to update the extension as soon as possible. 


Credits go to Helmut Hummel 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.