CVE-2021-41749

CRITICALNuclei

Code Injection in SEOmatic

Title source: GitHub Advisory
STIX 2.1 vulnerability

Record summary

CVE-2021-41749 has a selected CVSS score of 9.8 (critical); EIP currently links 1 Nuclei template.

Description

In the SEOmatic plugin up to 3.4.11 for Craft CMS 3, it is possible for unauthenticated attackers to perform a Server-Side Template Injection, allowing for remote code execution.

Description source: CVE List

Exploitation context

Available material

Nuclei templates
1

Affected products and versions

1
ProductSourceVersion range

nystudio107/craft-seomatic

Browse Packagist / nystudio107/craft-seomatic
GitHub AdvisoryBefore 3.4.11 · Fixed in 3.4.11affected

Nuclei templates

1
ProjectDiscoveryCRITICALCraftCMS SEOmatic - Server-Side Template InjectionCVSS 9.8

In the SEOmatic plugin up to 3.4.11 for Craft CMS 3, it is possible for unauthenticated attackers to perform a Server-Side. Template Injection, allowing for remote code execution.

Impact

Unauthenticated attackers can exploit SSTI via X-Forwarded-Host header to execute arbitrary Twig templates and system commands, achieving complete server compromise.

Remediation

Upgrade to CraftCMS SEOmatic version 3.4.12 or later.

WeaknessesCWE-94
Authorsiamnoooob, ritikchaddha
Template tagscve2021cvecraftcmscmssstinystudio107craft_cmsvuln
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CPE: cpe:2.3:a:nystudio107:seomatic:*:*:*:*:*:craft_cms:*:*
Shodan: X-Powered-By: Craft CMS html:"SEOmatic"
Shodan: x-powered-by: craft cms
Shodan: x-powered-by: craft cms html:"seomatic"
https://github.com/nystudio107/craft-seomatic/commit/3fee7d50147cdf3f999cfc1e04cbc3fb3d9f2f7d https://nvd.nist.gov/vuln/detail/CVE-2021-41749 https://github.com/nystudio107/craft-seomatic/blob/develop/CHANGELOG.md

Source: ProjectDiscovery

References

4