Winter CMS Server-Side Template Injection (SSTI) vulnerability

HIGH 7.2CVE-2024-29686 · GHSA-8r5j-gm3j-cx9c · Published 29/03/2024 · updated 17/06/2026

Package	Affected versions	Patched versions
wintercms/winter Packagist	`≤ 1.2.3`	No fix yet
winter wintercms	`= 1.2.3`	No fix yet

Description

Server-side Template Injection (SSTI) vulnerability in Winter CMS v.1.2.3 allows a remote attacker to execute arbitrary code via a crafted payload to the CMS Pages field and Plugin components.

NVD description

Server-side Template Injection (SSTI) vulnerability in Winter CMS v.1.2.3 allows a remote attacker to execute arbitrary code via a crafted payload to the CMS Pages field and Plugin components. NOTE: the vendor disputes this because the payload could only be entered by a trusted user, such as the owner of the server that hosts Winter CMS, or a developer working for them.

References

nvd.nist.gov/vuln/detail/CVE-2024-29686 · ADVISORY
forum.ksec.co.uk/t/webapps-winter-cms-1-2-3-server-side-template-injection-ssti-authenticated/2779 · WEB
wintercms/winter · PACKAGE
wintercms.com/docs/v1.2/docs/cms/themes · WEB
exploit-db.com/exploits/51893 · WEB

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