CVE-2021-44618

highpriority · track · 39EPSS 0.014 · 72 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.40% (72nd) EPSS

CVSS 7.5 · high

Is it mine?

3 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-28

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

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · OSV

v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-94USprimaryCWE-94US

affected products (3)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
nystudio107 seomatic= 3.4.12nvdUScpe:2.3:a:nystudio107:seomatic:*:*:*:*:*:*:*:*
Packagist nystudio107/craft-seomatic< 3.4.12osvUSpkg:composer/nystudio107/craft-seomatic

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-m3xv-x3ph-mq22Server-side Template Injection in nystudio107/craft-seomatic2022-03-12ghsa · osvUS
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.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2022-03-11modified 2026-06-17

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+10449 more

references (7)

External citations — patches, advisories, analysis.

scry

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