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)
EPSS: 0.005 (42.1th percentile) — read the EPSS interpretation.
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.
Affected products
- Concretecms Concrete_cms
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Permissions Required, x_refsource_MISC)
- cve@mitre.org (x_refsource_MISC, 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.