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.
Published 2021-09-27 13:15:08
Updated 2021-09-30 15:32:39
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Server-side request forgery (SSRF)

Exploit prediction scoring system (EPSS) score for CVE-2021-40109

Probability of exploitation activity in the next 30 days: 0.05%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 21 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-40109

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
5.5
MEDIUM AV:N/AC:L/Au:S/C:P/I:P/A:N
8.0
4.9
NIST
6.4
MEDIUM CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
3.1
2.7
NIST

CWE ids for CVE-2021-40109

  • The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-40109

Products affected by CVE-2021-40109

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