CVE-2013-6853: Yahoo Toolbar

Medium severity, CVSS 4.3. EPSS: 1.9% chance of exploitation in the next 30 days.

Cross-site scripting (XSS) vulnerability in clickstream.js in Y! Toolbar plugin for FireFox 3.1.0.20130813024103 for Mac, and 2.5.9.2013418100420 for Windows, allows remote attackers to inject arbitrary web script or HTML via a crafted URL that is stored by the victim.

Affected products

• Yahoo Toolbar: version 3.1.0.20130813024103 only; version 2.5.9.2013418100420 only

Published 2014-01-26. Last modified 2026-06-17.