CVE-2021-35440: Smashing Project Smashing

Medium severity, CVSS 6.1. EPSS: 1% chance of exploitation in the next 30 days.

Smashing 1.3.4 is vulnerable to Cross Site Scripting (XSS). A URL for a widget can be crafted and used to execute JavaScript on the victim's computer. The JavaScript code can then steal data available in the session/cookies depending on the user environment (e.g. if re-using internal URL's for deploying, or cookies that are very permissive) private information may be retrieved by the attacker.

Affected products

Published 2021-07-06. Last modified 2026-06-17.