Description
Craft is a content management system (CMS). Prior to 4.17.0-beta.1 and 5.9.0-beta.1, an authenticated administrator can achieve Remote Code Execution (RCE) by injecting a Server-Side Template Injection (SSTI) payload into Twig template fields (e.g., Email Templates). By calling the craft.app.fs.write() method, an attacker can write a malicious PHP script to a web-accessible directory and subsequently access it via the browser to execute arbitrary system commands. This vulnerability is fixed in 4.17.0-beta.1 and 5.9.0-beta.1.
References (4)
Scores
CVSS v3
9.1
EPSS
0.0020
EPSS Percentile
41.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
total
Details
CWE
CWE-1336
Status
published
Products (3)
craftcms/craft_cms
4.0.0 (4 CPE variants)
craftcms/craft_cms
5.0.0 (2 CPE variants)
craftcms/craft_cms
4.0.0 - 4.17.0
Published
Mar 04, 2026
Tracked Since
Mar 05, 2026