| Package | Affected versions | Patched versions |
|---|---|---|
| concrete cms | < 8.5.6 | 8.5.6 |
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.
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