SSRF in Concretecms Concrete Cms
CVE-2021-40109
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.005 (43.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- hackerone.com/reports/1102105 (Permissions Required)
- documentation.concretecms.org/developers/introduction/version-history/856-relea… (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-40109?
- CVE-2021-40109 is a medium-severity vulnerability in Concretecms Concrete Cms, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.4/10. Published 2021-09-27.
- How severe is CVE-2021-40109?
- Medium severity. CVSS v3 base score is 6.4 out of 10.