CVE-2021-44618
Server-side Template Injection in nystudio107/craft-seomatic
9.8
CRITICAL
CVSS 3.1
EPSS 1.3%
Description
A Server-side Template Injection (SSTI) vulnerability exists in Nystudio107 Seomatic prior to 3.4.12 in src/helpers/UrlHelper.php via the host header.
How to fix CVE-2021-44618
To remediate CVE-2021-44618, upgrade the affected package to a fixed version below.
- Packagist/nystudio107/craft-seomatic—upgrade to 3.4.12 or later
Is CVE-2021-44618 being exploited?
Low — EPSS is 1.3%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 3.4.12
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |