CVE-2020-5412: Externally Controlled Reference to a Resource in Another Sphere and Confused Deputy in Spring Cloud Netflix

org.springframework.cloud:spring-cloud-netflix Updated 02 Oct 2025

Summary

30/04/2021

Disclosed on

CVE-2020-5412

CVE

Yes i

Fix available

Moderate

Severity

6.5

CVSS Score

CVE-2020-5412: Spring Cloud Netflix, versions 2.2.x prior to 2.2.4, versions 2.1.x prior to 2.1.6, and older unsupported versions allow applications to use the Hystrix Dashboard proxy.stream endpoint to make requests to any server reac... Affects org.springframework.cloud:spring-cloud-netflix across 2 version ranges.

>= 2.1.0, < 2.1.6 >= 2.2.0, < 2.2.4

Fixed in 2.1.6 or 2.2.4, depending on the release line you run. How to fix ↓

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Background

Spring Cloud Netflix is a framework for building resilient and scalable microservices using the Netflix OSS stack. It provides integration with various Netflix components such as Eureka, Hystrix, Ribbon, and Zuul. This vulnerability affects versions 2.2.x prior to 2.2.4 and versions 2.1.x prior to 2.1.6 of the Spring Cloud Netflix package. The package allows applications to utilize the Hystrix Dashboard proxy.stream endpoint, which can be exploited by a malicious user to make requests to any server accessible by the server hosting the dashboard.

Vulnerability Detail

The vulnerability arises from the ability of an attacker to send requests to servers that should not be publicly exposed. By leveraging the Hystrix Dashboard proxy.stream endpoint, an attacker can bypass security measures and interact with servers that should be restricted. This can lead to unauthorized access, data leakage, and potential compromise of sensitive information. The vulnerability has a CVSS score of 6.5, indicating a moderate severity level.

How To Fix

Fixed versions by release line

The minimum fixed version depends on the release line you run.

>= 2.1.0, < 2.1.6 2.1.6
>= 2.2.0, < 2.2.4 2.2.4

Tip — Not sure which release line you're on? Vulert can find the fix for the version you are using. Scan free →

Workaround

There is no known workaround for this vulnerability. It is essential to apply the recommended fix by upgrading to the latest version of Spring Cloud Netflix.

Conclusion

In conclusion, the CVE-2020-5412 vulnerability in Spring Cloud Netflix allows an attacker to make unauthorized requests to servers that should not be publicly exposed. To mitigate this vulnerability, it is crucial to upgrade to the latest fixed versions of Spring Cloud Netflix. For further support on vulnerability remediation, please contact DevNack.com.

See every vulnerability recorded for org.springframework.cloud:spring-cloud-netflix →