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.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| nystudio107/craft-seomatic(Packagist) | 0 | 3.4.11 | N/A |
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