What’s Vulnerable › Vulnerabilities

CVE-2020-12790

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-05-11 · updated 2026-06-17
• Weakness: CWE-74

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.

Affected products

• Nystudio107 Seomatic: before 3.2.49 — fixed in 3.2.49

How to fix

Upgrade to a fixed version: Nystudio107 Seomatic 3.2.49. Check the vendor advisory for mitigations.

References

• https://github.com/nystudio107/craft-seomatic/blob/v3/CHANGELOG.md#3249---20200324
• https://github.com/nystudio107/craft-seomatic/commit/82f4a25b28fd622393da6592dc9e5ccee7fc5be3#diff-52fd042c50432133a00a8f840f4a6165
• https://github.com/nystudio107/craft-seomatic/releases/tag/3.2.49
• https://isec.pl/en/vulnerabilities/isec-0028-seomatic-ssti-23032020.txt
• https://github.com/nystudio107/craft-seomatic/blob/v3/CHANGELOG.md#3249---20200324
• https://github.com/nystudio107/craft-seomatic/commit/82f4a25b28fd622393da6592dc9e5ccee7fc5be3#diff-52fd042c50432133a00a8f840f4a6165
• https://github.com/nystudio107/craft-seomatic/releases/tag/3.2.49
• https://isec.pl/en/vulnerabilities/isec-0028-seomatic-ssti-23032020.txt

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