medium6.4
CVE-2021-40109
A SSRF issue was discovered in Concrete CMS through 8.5.5.
Impact
A SSRF issue was discovered in Concrete CMS through 8.5.5. Users can access forbidden files on their local network. A user with permissions to upload files from external sites can upload a URL that redirects to an internal resource of any file type. The redirect is followed and loads the contents of the file from the redirected-to server. Files of disallowed types can be uploaded.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Concretecms | Concrete Cms | before 8.5.6 |