Description
Craft is a platform for creating digital experiences. In versions 4.0.0-RC1 through 4.16.17 and 5.0.0-RC1 through 5.8.21, a Remote Code Execution (RCE) vulnerability exists in Craft CMS where the assembleLayoutFromPost() function in src/services/Fields.php fails to sanitize user-supplied configuration data before passing it to Craft::createObject(). This allows authenticated administrators to inject malicious Yii2 behavior configurations that execute arbitrary system commands on the server. This vulnerability represents an unpatched variant of the behavior injection vulnerability addressed in CVE-2025-68455, affecting different endpoints through a separate code path. This vulnerability is fixed in 5.8.22.
Problem types
CWE-470: Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')
Product status
>= 4.0.0-RC1, < 4.16.18
References
github.com/...ms/cms/security/advisories/GHSA-7jx7-3846-m7w7
github.com/...ommit/395c64f0b80b507be1c862a2ec942eaacb353748
github.com/craftcms/cms/releases/tag/5.8.22