CVE-2009-4127: Wikipedia Toolbar

High severity, CVSS 9.3. EPSS: 5% chance of exploitation in the next 30 days.

Unspecified vulnerability in Wikipedia Toolbar extension before 0.5.9.2 for Firefox allows user-assisted remote attackers to execute arbitrary JavaScript with Chrome privileges via vectors involving unspecified Toolbar buttons and the eval function. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.

Affected products

• Wikipedia Wikipedia Toolbar: up to and including 0.5.9.1; version 0.2 only; version 0.4 only; version 0.4.1 only; version 0.4.2 only; version 0.4.4 only; …

Published 2009-12-02. Last modified 2026-06-16.