Critical severity9.8NVD Advisory· Published Mar 11, 2022· Updated Jun 17, 2026
CVE-2021-44618
CVE-2021-44618
Description
A Server-side Template Injection (SSTI) vulnerability exists in Nystudio107 Seomatic 3.4.12 in src/helpers/UrlHelper.php via the host header.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
nystudio107/craft-seomaticPackagist | < 3.4.12 | 3.4.12 |
Affected products
3- cpe:2.3:a:nystudio107:seomatic:3.4.12:*:*:*:*:craft_cms:*:*
- Nystudio107/Seomaticdescription
Patches
Vulnerability mechanics
References
4- github.com/nystudio107/craft-seomatic/commit/0c5c0c0e0cb61000d12ec55ebf174745a5bf6469nvdPatchThird Party AdvisoryWEB
- github.com/advisories/GHSA-m3xv-x3ph-mq22ghsaADVISORY
- github.com/nystudio107/craft-seomatic/releases/tag/3.4.12nvdRelease NotesThird Party AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2021-44618ghsaADVISORY
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