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CVE-2021-29442

69
FAUCET Score

CVE-2021-29442 is an authentication bypass vulnerability affecting Alibaba Nacos versions prior to 1.4.1. It allows unauthenticated attackers to access sensitive management endpoints, specifically the /derby endpoint, when Nacos is configured to use its embedded Derby database. This vulnerability has a CVSS score of 7.5 (High), indicating a critical risk due to its network-based attack vector, low attack complexity, and high potential for confidentiality impact, as attackers can query or wipe out the database. While not listed on the KEV catalog or Hot List, and with no reported active exploitation, public exploit code exists via Nuclei templates, though community discussion and media coverage are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.4.1CPE matchmatch criteria
cpe:2.3:a:alibaba:nacos:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.6HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
4.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
64.70%
Probability of exploitation in next 30 days
EPSS Percentile
99.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Nuclei: CVE-2021-29442 · Apr 28, 2021
This CVE's current EPSS score of 0.6470 is in the 99th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
mavenpatch availablevia ghsa
Product: com.alibaba.nacos:nacos-commonFixed in: 1.4.1

Vendor Advisories (1)

mavenGHSA-xv5h-v7jh-p2qhhigh

Authentication bypass for specific endpoint

Apr 27, 2021

References

github.com / advisories/GHSA-36hp-jr8h-556f
ExploitThird Party Advisory
github.com / alibaba/nacos/issues/4463
ExploitThird Party Advisory
github.com / alibaba/nacos/pull/4517
PatchThird Party Advisory