Overview
About vulnerability
Required Permissions
The exploitation requires a few permissions to be enabled in the used GraphQL schema:
- “Edit assets in the
volume” - “Create assets in the
volume”
Details
The implementation fails to restrict the URL Scheme. While the application is intended to “upload assets”, there is no whitelist forcing http or https. This allows attackers to use the Gopher protocol to wrap raw TCP commands.
Impact: Combined with the DWORD bypass, an attacker can hit internal services without triggering any “127.0.0.1” string-matching filters.
Example Payload: gopher://2130706433:6379/_FLUSHALL (Targets local Redis via DWORD).
Remediation Strategy
To prevent mathematical IP obfuscation, the application must normalize the hostname before validation.
Details
- Affected product:
- craftcms/cms , craftcms/feed-me
- Affected packages:
- craftcms/cms @ 3.9.15 (+2 more)