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CVE-2026-33157

Craft CMS: Potential authenticated Remote Code Execution via malicious attached Behavior

Published: Mar 24, 2026Updated: Mar 26, 2026 Sources: CVE List NVDCWE-470
NVD MITRE
7.2CVSSHIGH
EPSS Score
1.0%
Top 41.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Craft CMS is a content management system (CMS). From version 5.6.0 to before version 5.9.13, a Remote Code Execution (RCE) vulnerability exists in Craft CMS, it can be exploited by any authenticated user with control panel access. This is a bypass of a previous fix. The existing patches add cleanseConfig() to assembleLayoutFromPost() and various FieldsController actions to strip Yii2 behavior/event injection keys ("as" and "on" prefixed keys). However, the fieldLayouts parameter in ElementIndexesController::actionFilterHud() is passed directly to FieldLayout::createFromConfig() without any sanitization, enabling the same behavior injection attack chain. This issue has been patched in version 5.9.13.

CVSS Vector Breakdown

AV:NAC:LPR:HUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-470

Affected Products

craft cmscraftcmsWeb & CMS Plugins
cmscraftcmsWeb & CMS Plugins
craftcmscommercialNZWeb & CMS Plugins

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Execution
View detailed technique mapping

References

https://github.com/craftcms/cms/commit/97e90b4bdee369c1af3ca77a77531132df240e4e
github.com
https://github.com/craftcms/cms/releases/tag/5.9.13
github.com
https://github.com/craftcms/cms/security/advisories/GHSA-2fph-6v5w-89hh
github.com

Timeline

Published
Mar 24, 2026
Last Updated
Mar 26, 2026

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