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TYPO3-EXT-SA-2018-004: Cross-site scripting vulnerability in extension "Powermail" (powermail)

Categories: Security Created by Torben Hansen
It has been discovered that the extension "Powermail" (powermail) is susceptible to Cross-Site Scripting.
  • Release Date: August 9, 2018
  • Component Type: Third party extension. This extension is not a part of the TYPO3 default installation.
  • Vulnerability Type: Cross-site scripting
  • Affected Versions: 2.25.2 and below 
  • Severity: Medium
  • Suggested CVSS v3.0: AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C
  • CVE: not assigned yet

Problem Description

The extension uses \TYPO3\CMS\Core\Utility\GeneralUtility::removeXSS(), which is known to be vulnerable to XSS.

Note: Affected is only the old version 2.25.2 and below of Powermail for TYPO3 6.2 and 7.6

Solution

An updated version 2.25.3 is available from the TYPO3 extension manager and at https://extensions.typo3.org/extension/download/powermail/2.25.3/zip/. 
Users of the extension are advised to update the extension as soon as possible. 

Credits

Thanks to Ralf Merz 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.