TYPO3-EXT-SA-2017-015: Cross Site-Scripting in extension "Smallads" (ke_smallads)

It has been discovered that the extension "Smallads" (ke_smallads) is susceptible to Cross-Site Scripting.

Release Date: December 18, 2017

Component Type: Third party extension. This extension is not a part of the TYPO3 default installation.

Affected Versions: version 1.3.2 and below

Vulnerability Type: Cross-Site Scripting

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 (What's that?)

CVE: not assigned yet

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

Solution: An updated version 1.3.3 is available from the TYPO3 Extension Manager and at https://extensions.typo3.org/extension/download/ke_smallads/1.3.3/zip/. Users of the extension are advised to update the extension as soon as possible.

Credits: Credits go to the security team member Torben Hansen 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 to receive future Security Bulletins via E-mail.