Possible Craft CMS RCE via Query-String CLI Option Injection
- Category
- webserver
- Author
- HuntRule
- Published
- 2026-09-08
- Updated
- 2026-09-08
ATT&CK techniques
Initial Access → ExecutionRecon
Resource Dev
Initial Access
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule detects HTTP requests that inject Yii/Craft CLI options such as --templatesPath or --configPath through the query string, abusing PHP register_argc_argv on Craft CMS. This technique matches the Assetnote Craft CMS PHP footgun research where attacker-controlled argv values point to remote FTP or PHP stream wrappers to achieve remote code execution. Detecting these option strings early surfaces exploitation of the underlying command-line parsing footgun before code execution.
Reporting behind it
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.
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