How severe is CVE-2020-12790?

CVE-2020-12790 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-12790 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-12790?

CVE-2020-12790 affects Nystudio107 Seomatic. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-12790?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-12790 published?

CVE-2020-12790 was published on 2020-05-11 and last updated on 2026-06-17.

CVE-2020-12790

CVE-2020-12790 is a high-severity vulnerability in Nystudio107 Seomatic with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-74.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-74
Affected product: Nystudio107 Seomatic
Published: 2020-05-11
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2020-12790?: 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.
How severe is CVE-2020-12790?: CVE-2020-12790 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-12790 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-12790?: CVE-2020-12790 affects Nystudio107 Seomatic. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-12790?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-12790 published?: CVE-2020-12790 was published on 2020-05-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nystudio107:seomatic:*:*:*:*:*:craft_cms:*:*

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