Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2021-29441

8.6 · HIGH

Nacos is a platform designed for dynamic service discovery and configuration and service management.

Published Apr 27, 2021CWE-290EPSS 83.48%

Overview

CVE-2021-29441 is a high-severity vulnerability. It was published on April 27, 2021 and has a CVSS 3.1 base score of 8.6 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.6, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Nacos is a platform designed for dynamic service discovery and configuration and service management. In Nacos before version 1.4.1, when configured to use authentication (-Dnacos.core.auth.enabled=true) Nacos uses the AuthFilter servlet filter to enforce authentication. This filter has a backdoor that enables Nacos servers to bypass this filter and therefore skip authentication checks. This mechanism relies on the user-agent HTTP header so it can be easily spoofed. This issue may allow any user to carry out any administrative tasks on the Nacos server.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/advisories/GHSA-36hp-jr8h-556fGitHubgithub.com/alibaba/nacos/issues/4701GitHubgithub.com/alibaba/nacos/pull/4703GitHubgithub.com/advisories/GHSA-36hp-jr8h-556fGitHubgithub.com/alibaba/nacos/issues/4701GitHubgithub.com/alibaba/nacos/pull/4703

How CyberStrike helps

Frequently asked questions

What is CVE-2021-29441?

CVE-2021-29441 is a high-severity vulnerability. It was published on April 27, 2021 and has a CVSS 3.1 base score of 8.6 (HIGH).

How severe is CVE-2021-29441?

This vulnerability has a CVSS 3.1 base score of 8.6, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-29441?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-29441?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-29441 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related HIGH CVEs from 2021

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999