CVE-2021-40186

DNN CMS Server-Side Request Forgery (SSRF)

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

El equipo de investigación de AppCheck identificó una vulnerabilidad de tipo Server-Side Request Forgery (SSRF) dentro de la plataforma DNN CMS, anteriormente conocida como DotNetNuke. Las vulnerabilidades de tipo SSRF permiten al atacante explotar el sistema de destino para realizar peticiones de red en su nombre, permitiendo una serie de posibles ataques. En el escenario más común, el atacante aprovecha las vulnerabilidades de tipo SSRF para atacar sistemas detrás del firewall y acceder a información confidencial de los servicios de metadatos del proveedor de la nube

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-08-29 CVE Reserved
2022-05-31 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-918: Server-Side Request Forgery (SSRF)

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC
https://appcheck-ng.com/dnn-cms-server-side-request-forgery-cve-2021-40186	2024-08-04

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Dnnsoftware Search vendor "Dnnsoftware"		Dotnetnuke Search vendor "Dnnsoftware" for product "Dotnetnuke"				<= 9.10.2 Search vendor "Dnnsoftware" for product "Dotnetnuke" and version " <= 9.10.2"		-		Affected