CVE-2020-12790 SEOmatic for CraftCMS allows Server-Side Template Injection

What is CVE-2020-12790?

CVE-2020-12790 is a high-severity code injection vulnerability in n/a, published on 11 May 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-74

Which versions are affected by CVE-2020-12790?

2 open source packages ship an affected version, including nystudio107/craft-seomatic. It affects 1 product.

Products include Nystudio107 Seomatic.

How do I fix CVE-2020-12790?

Upgrade nystudio107/craft-seomatic to 3.2.49 or later.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2020-12790 being exploited?

There is no known exploitation of CVE-2020-12790 in the wild and no public exploit code.

Other vulnerabilities in n/a

• CVE-2021-41749 Code Injection in SEOmatic Critical 9.8
• CVE-2021-44618 Server-side Template Injection in nystudio107/craft-seomatic Critical 9.8
• CVE-2018-14716 SEOmatic plugin for Craft CMS SSTI Vulnerability High 7.5
• CVE-2021-41750 Cross-site Scripting in SEOmatic plugin Medium 6.1

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-23q7-59jj-2pj4.