CVE-2021-44618 json
Server-side Template Injection in nystudio107/craft-seomatic
published 2022-03-11 4 y ago modified 2026-06-17 4 mo ago also GHSA-m3xv-x3ph-mq22 , EUVD-2022-1466
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 72%
- public exploits
- 0
- none known
Summary
A Server-side Template Injection (SSTI) vulnerability exists in Nystudio107 Seomatic 3.4.12 in src/helpers/UrlHelper.php via the host header.
Patch / fix
- packagist nystudio107/craft-seomatic 3.4.12
Exploit prediction
1.40% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | nystudio107/craft-seomatic | <3.4.12 |
3.4.12 |
Classification
- Weakness
-
- CWE-94 Improper Control of Generation of Code
References
-
github.com
/nystudio107/craft-seomatic/commit/0c5c0c0e0cb61000d12ec55ebf174745a5bf6469
web, patch, third-party-advisory
-
github.com
/nystudio107/craft-seomatic/releases/tag/3.4.12
web, release-notes, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-44618
advisory
-
github.com
/nystudio107/craft-seomatic
package
Sources
- CVE List CVE-2021-44618
- GitHub Advisory GHSA-m3xv-x3ph-mq22
- NVD CVE-2021-44618
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