Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') Affecting craftcms/cms package, versions >=5.6.0, <5.9.13
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PHP-CRAFTCMSCMS-15763112
- published25 Mar 2026
- disclosed24 Mar 2026
- credityuma4869
Introduced: 24 Mar 2026
NewCVE-2026-33157 (opens in a new tab)How to fix?
Upgrade craftcms/cms to version 5.9.13 or higher.
Overview
craftcms/cms is a content management system.
Affected versions of this package are vulnerable to Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') in the actionFilterHud process. An attacker can execute arbitrary code on the server by supplying a crafted fieldLayouts parameter containing malicious configuration keys that are processed without proper sanitization. This is only exploitable if the attacker has an authenticated account with control panel access.