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.
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-35440
- https://github.com/Smashing/smashing/pull/186
- https://github.com/Smashing/smashing/pull/186#issuecomment-871727614
- https://github.com/Smashing/smashing/blob/ad7325f159f89854ca4e7d94e7be9bee507b6d46/CHANGELOG.md
- https://github.com/advisories/GHSA-254j-mmc5-qhpx