CVE-2021-40186
mediumpriority · track · 30EPSS 0.011 · 67 %ileEUUSEPSS · scored 2026-10-28
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (5)
External citations — patches, advisories, analysis.
- https://appcheck-ng.com/dnn-cms-server-side-request-forgery-cve-2021-40186cnnvd
- https://cxsecurity.com/cveshow/CVE-2021-40186/cnnvd
- https://www.cybersecurity-help.cz/vdb/SB2022060215cnnvd
- https://appcheck-ng.com/dnn-cms-server-side-request-forgery-cve-2021-40186enisa_euvd
- https://appcheck-ng.com/dnn-cms-server-side-request-forgery-cve-2021-40186ExploitThird Party Advisorynvd
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