CVE-2021-43116

Name: CVE-2021-43116
Creator: NVD / NIST
Published: 2022-07-05T14:15:08.767+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 5.55%

Last modified Jun 17, 2026

CVE-2021-43116 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 5.55% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

5.55%

91.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Alibaba	Nacos	<= 2.0.3

References

http://packetstormsecurity.com/files/171638/Nacos-2.0.3-Access-Control.html
https://github.com/alibaba/nacos/issues/7127Exploit, Issue Tracking, Third Party Advisory
https://github.com/alibaba/nacos/issues/7182Exploit, Issue Tracking, Third Party Advisory
http://packetstormsecurity.com/files/171638/Nacos-2.0.3-Access-Control.html
https://github.com/alibaba/nacos/issues/7127Exploit, Issue Tracking, Third Party Advisory
https://github.com/alibaba/nacos/issues/7182Exploit, Issue Tracking, Third Party Advisory

Timeline

Published: Jul 5, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-43116?

How severe is CVE-2021-43116?

CVE-2021-43116 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 5.55% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43116?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-43116?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST