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TYPO3-20080527-1: Cross Site Scripting vulnerability in extension "KJ: Image Lightbox v2" (kj_imagelightbox2)

It has been discovered that the extension "KJ: Image Lightbox v2" (kj_imagelightbox2) is susceptible to Cross Site Scripting (XSS) attacks.

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

Affected Versions: Version 1.4.2 and below, possibly also all versions of obsolete predecessor extension kj_imagelightbox

Vulnerability Type: Cross Site Scripting

Severity: Medium

Problem Description: Failing to filter user input the extension is susceptible to Cross Site Scripting (XSS) making it possible to execute arbitrary JavaScript.

Solution: An updated version 1.4.3 is available from the TYPO3 extension manager and at typo3.org/extensions/repository/view/kj_imagelightbox2/1.4.3/. Users of the extension are advised to update the extension as soon as possible.

Users of the extension kj_imagelightbox, which is the predecessor of kj_imagelightbox2, should switch to kj_imagelightbox2 1.4.3 too. The predecessor might contain the same security issue, but is no longer part of TER because the extension author decided to not maintain it any longer.

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.

Credits: Credits go to Michael Raberger, who discovered the issues. Furthermore the TYPO3 Security Team wishes to thank the extension author Julian Kleinhans for fixing the issue.