CVE-2021-44618

Server-side Template Injection in nystudio107/craft-seomatic

Published 11 Mar 2022Modified 17 Jun 2026CWE 94

In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

GHSA9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by GHSA (high).

Description

A Server-side Template Injection (SSTI) vulnerability exists in Nystudio107 Seomatic 3.4.12 in src/helpers/UrlHelper.php via the host header.

Affected packages and fixed versions

Source	Package	Fixed in
composer::GitHub Security Advisory Composer	nystudio107/craft-seomatic	3.4.12

References

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RecordsEach decision is recorded with the policy that ran and its hash, then sealed under a signed checkpoint.

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