cvedb.io
CVE-2021-40109
MEDIUM · CVSS 6.4
EPSS exploitation probability: 0%
Published 2021-09-27T13:15:08.107 · Last modified 2026-06-17T04:06:32.197

Summary

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

concretecms — concrete_cms

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.