What’s Vulnerable › Vulnerabilities

CVE-2020-9757

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 72.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-03-04 · updated 2026-06-17
• Weakness: CWE-74

Description

The SEOmatic component before 3.3.0 for Craft CMS allows Server-Side Template Injection that leads to RCE via malformed data to the metacontainers controller.

Affected products

• craftcms cms: before 3.3.0 — fixed in 3.3.0

How to fix

Upgrade to a fixed version: craftcms cms 3.3.0. Check the vendor advisory for mitigations.

References

• https://github.com/giany/CVE/blob/master/CVE-2020-9757.txt
• https://github.com/nystudio107/craft-seomatic/blob/v3/CHANGELOG.md
• https://github.com/nystudio107/craft-seomatic/commit/65ab659cb6c914c7ad671af1e417c0da2431f79b
• https://github.com/nystudio107/craft-seomatic/commit/a1c2cad7e126132d2442ec8ec8e9ab43df02cc0f
• https://github.com/giany/CVE/blob/master/CVE-2020-9757.txt
• https://github.com/nystudio107/craft-seomatic/blob/v3/CHANGELOG.md
• https://github.com/nystudio107/craft-seomatic/commit/65ab659cb6c914c7ad671af1e417c0da2431f79b
• https://github.com/nystudio107/craft-seomatic/commit/a1c2cad7e126132d2442ec8ec8e9ab43df02cc0f

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