CVE-2021-29441
8.6 · HIGHOverview
CVE-2021-29441 is a high-severity vulnerability affecting alibaba nacos. 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 and patches from alibaba. Update nacos to the latest patched version. 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.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| alibaba | nacos | >= 0, < 1.4.1 | Affected |
Frequently Asked Questions
What is CVE-2021-29441?
CVE-2021-29441 is a high-severity vulnerability affecting alibaba nacos. 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 and patches from alibaba. Update nacos to the latest patched version. 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's AI-powered security agents can automatically detect CVE-2021-29441 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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