CVE-2026-25498
February 09, 2026
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.
Affected Packages
https://github.com/craftcms/cms.git (GITHUB):
Affected version(s) >=5.0.0 <5.8.22Fix Suggestion:
Update to version 5.8.22https://github.com/craftcms/cms.git (GITHUB):
Affected version(s) >=4.0.0 <4.16.18Fix Suggestion:
Update to version 4.16.18craftcms/cms (PHP):
Affected version(s) >=5.0.0-RC1 <5.8.22Fix Suggestion:
Update to version 5.8.22craftcms/cms (PHP):
Affected version(s) >=4.0.0-RC1 <4.16.18Fix Suggestion:
Update to version 4.16.18Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.6
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
HIGH
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.2
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')
EPSS
Base Score:
0.12
