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Fencer Vulns
high 8.8

CVE-2021-43116 json

Use of Hard-coded Credentials in Nacos

published 2022-07-05 4 y ago modified 2026-09-10 1 mo ago also GHSA-2g86-r6w2-wqqr , EUVD-2022-6208

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
7.5%
EPSS 7.5% chance of exploitation in 30 days, percentile 94%
public exploits
1
Exploit-DB

Summary

An Access Control vulnerability exists in Nacos 2.0.3 in the access prompt page; enter username and password, click on login to capture packets and then change the returned package, which lets a malicious user login.

Timeline

  1. Published
  2. First public exploit (EDB-51205)

Exploit prediction

7.46% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-51205 Nacos 2.0.3 - Access Control vulnerability webapps, 2023-04-03
  • github.com https://github.com/alibaba/nacos/issues/7127 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/alibaba/nacos/issues/7182 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P
GitHub 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
maven com.alibaba.nacos:nacos-client
<=2.0.3
 no fix listed

Classification

Weakness
  • CWE-287 Improper Authentication
  • CWE-798 Use of Hard-coded Credentials

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.