What is the severity of CVE-2021-40186?

CVE-2021-40186 has a high severity rating due to its potential for significant impact on system security.

How do I fix CVE-2021-40186?

To fix CVE-2021-40186, you should upgrade DNN CMS to the latest version beyond 9.10.2.

What does CVE-2021-40186 allow an attacker to do?

CVE-2021-40186 allows an attacker to perform Server-Side Request Forgery (SSRF), potentially leading to unauthorized access to internal resources.

Is CVE-2021-40186 present in earlier versions of DNN CMS?

Yes, CVE-2021-40186 affects DNN CMS versions up to and including 9.10.2.

How can I confirm if my system is vulnerable to CVE-2021-40186?

You can confirm if your system is vulnerable to CVE-2021-40186 by checking the version of DNN CMS you are using and evaluating any associated security advisories.

Vulnerability/
CVE-2021-40186

high

7.5

CWE

918

31/5/2022

4/8/2024

CVE-2021-40186: DNN CMS Server-Side Request Forgery (SSRF)

First published: Tue May 31 2022(Updated: )

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.

Credit: info@appcheck-ng.com

Affected Software	Affected Version	How to fix
DNN (DotNetNuke)	<=9.10.2

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Reference Links

https://appcheck-ng.com/dnn-cms-server-side-request-forgery-cve-2021-40186

Frequently Asked Questions

What is the severity of CVE-2021-40186?
CVE-2021-40186 has a high severity rating due to its potential for significant impact on system security.
How do I fix CVE-2021-40186?
To fix CVE-2021-40186, you should upgrade DNN CMS to the latest version beyond 9.10.2.
What does CVE-2021-40186 allow an attacker to do?
CVE-2021-40186 allows an attacker to perform Server-Side Request Forgery (SSRF), potentially leading to unauthorized access to internal resources.
Is CVE-2021-40186 present in earlier versions of DNN CMS?
Yes, CVE-2021-40186 affects DNN CMS versions up to and including 9.10.2.
How can I confirm if my system is vulnerable to CVE-2021-40186?
You can confirm if your system is vulnerable to CVE-2021-40186 by checking the version of DNN CMS you are using and evaluating any associated security advisories.

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agent/weakness
agent/last-modified-date
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agent/first-publish-date
agent/event
agent/source
agent/softwarecombine
agent/tags
collector/nvd-index
agent/software-canonical-lookup-request
vendor/dnnsoftware
canonical/dnn (dotnetnuke)
version/dnn (dotnetnuke)/9.10.2

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