CVE-2021-29442
HighExploitedAuthentication bypass for specific endpoint
Published Apr 27, 2021 · Updated Jul 9, 2026 · Also known as GHSA-xv5h-v7jh-p2qh
Key Facts
Patch immediately- CVE-2021-29442 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting Nacos (Alibaba), com.alibaba.nacos:nacos-common (maven).
- It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Oct 14, 2023. No public exploit code is known.
- EPSS estimates a 66% probability of exploitation in the next 30 days.
- Fixed versions are available, including Nacos 1.4.1, com.alibaba.nacos:nacos-common 1.4.1.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS (30-day exploit likelihood)
66%
Higher than 99.2% of all scored CVEs
Exploited in the wild
Yes
2 catalog listings
Public exploit code
None known
Get the full CVE-2021-29442 brief as a PDF
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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)
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Nov 19, 2023 | n/a | Not reported |
| CIRCL KEV | Oct 14, 2023 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| NacosAlibaba | >= < 1.4.1 | 1.4.1 |
| com.alibaba.nacos:nacos-commonmaven | See advisory | 1.4.1 |
Patched Releases
Nacos
1.4.1
com.alibaba.nacos:nacos-common
1.4.1
Timeline
Publicly disclosed
Apr 27, 2021
Added to CIRCL KEV
Oct 14, 2023
Added to Industry KEV feed
Nov 19, 2023
Last updated
Jul 9, 2026
Weakness Type
- CWE-290 Authentication Bypass by Spoofing
- CWE-306 Missing Authentication for Critical Function
References
- advisoryGHSA advisory
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2021-29441
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2021-29442
- patchhttps://github.com/alibaba/nacos/pull/4517
- exploitVulnCheck exploitation report
FAQ
Common Questions.
Nacos is a platform designed for dynamic service discovery and configuration and service management.
Affected: Nacos (Alibaba) versions >= < 1.4.1; com.alibaba.nacos:nacos-common (maven). The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Oct 14, 2023.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Nacos 1.4.1, com.alibaba.nacos:nacos-common 1.4.1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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