CVE-2021-29442: Authentication bypass

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 65.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-04-27 · updated 2026-06-17
Weakness: CWE-306

Description

Nacos is a platform designed for dynamic service discovery and configuration and service management. In Nacos before version 1.4.1, the ConfigOpsController lets the user perform management operations like querying the database or even wiping it out. While the /data/remove endpoint is properly protected with the @Secured annotation, the /derby endpoint is not protected and can be openly accessed by unauthenticated users. These endpoints are only valid when using embedded storage (derby DB) so this issue should not affect those installations using external storage (e.g. mysql)

Affected products

alibaba nacos: before 1.4.1 — fixed in 1.4.1

How to fix

Upgrade to a fixed version: alibaba nacos 1.4.1. Check the vendor advisory for mitigations.

References

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