CVE-2021-41750: NYSTUDIO107 Seomatic

Medium severity, CVSS 6.1. EPSS: 1.1% chance of exploitation in the next 30 days.

A cross-site scripting (XSS) vulnerability in the SEOmatic plugin 3.4.10 for Craft CMS 3 allows remote attackers to inject arbitrary web script via a GET to /index.php?action=seomatic/file/seo-file-link with url parameter containing the base64 encoded URL of a malicious web page / file and fileName parameter containing an arbitrary filename with the intended content-type to be rendered in the user's browser as the extension.

Affected products

• NYSTUDIO107 Seomatic: version 3.4.10 only

Published 2022-06-12. Last modified 2026-06-17.