What’s Vulnerable › Vulnerabilities

CVE-2021-44618

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-03-11 · updated 2026-06-17
• Weakness: CWE-94

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 products

• Nystudio107 Seomatic: 3.4.12

References

• https://github.com/nystudio107/craft-seomatic/commit/0c5c0c0e0cb61000d12ec55ebf174745a5bf6469
• https://github.com/nystudio107/craft-seomatic/releases/tag/3.4.12
• https://github.com/nystudio107/craft-seomatic/commit/0c5c0c0e0cb61000d12ec55ebf174745a5bf6469
• https://github.com/nystudio107/craft-seomatic/releases/tag/3.4.12

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