CVE-2018-14716 SEOmatic plugin for Craft CMS SSTI Vulnerability

What is CVE-2018-14716?

CVE-2018-14716 is a high-severity code injection vulnerability in n/a, published on 6 Aug 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A Server Side Template Injection (SSTI) was discovered in the SEOmatic plugin before 3.1.4 for Craft CMS, because requests that don't match any elements incorrectly generate the canonicalUrl, and can lead to execution of Twig code.

Weakness: CWE-94

Which versions are affected by CVE-2018-14716?

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-2018-14716?

Upgrade nystudio107/craft-seomatic to 3.1.4 or later.

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

Is CVE-2018-14716 being exploited?

There is no known exploitation of CVE-2018-14716 in the wild and no public exploit code.

Public exploit code: 1 Exploit-DB entry and 1 proofs of concept on GitHub.

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-2020-12790 SEOmatic for CraftCMS allows Server-Side Template Injection 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-6j9m-rp7m-3gfg.