CVE-2021-40186

DNN CMS Server-Side Request Forgery (SSRF)

HIGH
7.5
CVSS Score
Published: May 31, 2022 at 06:09 PM UTC
Updated: June 17, 2026 at 04:06 AM UTC
1 product affected across 1 vendorDotnetnuke

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Severity
HIGH7.5
Exploit prediction
EPSS 1%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 9.10.29.0 ≤ v < 9.11.09.0
Affected range stops below 9.11.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-918

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