CVE-2020-9757

Name: CVE-2020-9757
Creator: NVD / NIST
Published: 2020-03-04T17:15:12.157+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 73.43%

Last modified Jun 17, 2026

CVE-2020-9757 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 73.43% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

73.43%

99.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-74

Affected Software

Vendor	Product	Versions
Craftcms	Craft Cms	< 3.3.0

References

https://github.com/giany/CVE/blob/master/CVE-2020-9757.txtExploit, Third Party Advisory
https://github.com/nystudio107/craft-seomatic/blob/v3/CHANGELOG.mdRelease Notes, Third Party Advisory
https://github.com/nystudio107/craft-seomatic/commit/65ab659cb6c914c7ad671af1e417c0da2431f79bPatch, Third Party Advisory
https://github.com/nystudio107/craft-seomatic/commit/a1c2cad7e126132d2442ec8ec8e9ab43df02cc0fPatch, Third Party Advisory
https://github.com/giany/CVE/blob/master/CVE-2020-9757.txtExploit, Third Party Advisory
https://github.com/nystudio107/craft-seomatic/blob/v3/CHANGELOG.mdRelease Notes, Third Party Advisory
https://github.com/nystudio107/craft-seomatic/commit/65ab659cb6c914c7ad671af1e417c0da2431f79bPatch, Third Party Advisory
https://github.com/nystudio107/craft-seomatic/commit/a1c2cad7e126132d2442ec8ec8e9ab43df02cc0fPatch, Third Party Advisory

Timeline

Published: Mar 4, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-9757?

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.

How severe is CVE-2020-9757?

CVE-2020-9757 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 73.43% probability of exploitation in the next 30 days.

How do I fix CVE-2020-9757?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-9757?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST