CVE-2021-40109
Medium
Description
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.
SeverityMedium
CVSS6.4
Exploit probability—
Product
Concretecms Concrete Cms
PublishedSep 27, 2021
First seenSep 27, 2021
How to fix
Update
- concretecms concrete_cms8.5.6 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| concretecms concrete_cms | v < 8.5.6 | 8.5.6 |
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