Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Concretecms | Concrete Cms | < 8.5.6 |
Related Weaknesses (CWE)
References
- https://documentation.concretecms.org/developers/introduction/version-history/85Release NotesVendor Advisory
- https://hackerone.com/reports/1102105Permissions Required
- https://documentation.concretecms.org/developers/introduction/version-history/85Release NotesVendor Advisory
- https://hackerone.com/reports/1102105Permissions Required
FAQ
What is CVE-2021-40109?
CVE-2021-40109 is a vulnerability with a CVSS score of 6.4 (MEDIUM). 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 re...
How severe is CVE-2021-40109?
CVE-2021-40109 has been rated MEDIUM with a CVSS base score of 6.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-40109?
Check the references section above for vendor advisories and patch information. Affected products include: Concretecms Concrete Cms.