The AppCheck research team identified a Server-Side Request Forgery (SSRF) vulnerability within the DNN CMS platform, formerly known as DotNetNuke. SSRF vulnerabilities allow the attacker to exploit the target system to make network requests on their behalf, allowing a range of possible attacks. In the most common scenario, the attacker exploits SSRF vulnerabilities to attack systems behind the firewall and access sensitive information from Cloud Provider metadata services.
Published 2022-06-02 14:15:30
Updated 2022-06-09 17:07:03
Source AppCheck Ltd.
View at NVD,   CVE.org
Vulnerability category: Server-side request forgery (SSRF)

Exploit prediction scoring system (EPSS) score for CVE-2021-40186

0.21%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 58 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-40186

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.0
MEDIUM AV:N/AC:L/Au:N/C:P/I:N/A:N
10.0
2.9
NIST
6.5
MEDIUM CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
2.8
3.6
AppCheck Ltd.
7.5
HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.9
3.6
NIST

CWE ids for CVE-2021-40186

  • 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:
    • info@appcheck-ng.com (Secondary)
    • nvd@nist.gov (Primary)

References for CVE-2021-40186

Products affected by CVE-2021-40186

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