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Vulnerability record · CVE-2020-12790 · published 11 May 2020

CVE-2020-12790: Nystudio107 seomatic injection vulnerability

Nystudio107 · Seomatic

In the SEOmatic plugin before 3.2.49 for Craft CMS, helpers/DynamicMeta.php does not properly sanitize the URL. This leads to Server-Side Template Injection and credentials disclosure via a crafted Twig template after a semicolon.

7.5 CVSS 3.1 High EPSS 2.2% · top 18.3% CWE-74 · Injection
7.5CVSS 3.1 base score, v2 5.0
2.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

In the SEOmatic plugin before 3.2.49 for Craft CMS, helpers/DynamicMeta.php does not properly sanitize the URL. This leads to Server-Side Template Injection and credentials disclosure via a crafted Twig template after a semicolon.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/nystudio107/craft-seomatic/blob/v3/CHANGELOG.md#3249---20200324 Release NotesThird Party Advisory
https://github.com/nystudio107/craft-seomatic/commit/82f4a25b28fd622393da6592dc9e5ccee7fc5be3#diff-52fd042c50432133a00a8 PatchThird Party Advisory
https://github.com/nystudio107/craft-seomatic/releases/tag/3.2.49 Release NotesThird Party Advisory
https://isec.pl/en/vulnerabilities/isec-0028-seomatic-ssti-23032020.txt ExploitThird Party Advisory
https://github.com/nystudio107/craft-seomatic/blob/v3/CHANGELOG.md#3249---20200324 Release NotesThird Party Advisory
https://github.com/nystudio107/craft-seomatic/commit/82f4a25b28fd622393da6592dc9e5ccee7fc5be3#diff-52fd042c50432133a00a8 PatchThird Party Advisory
https://github.com/nystudio107/craft-seomatic/releases/tag/3.2.49 Release NotesThird Party Advisory
https://isec.pl/en/vulnerabilities/isec-0028-seomatic-ssti-23032020.txt ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-12790), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.