CVE-2021-43116

8.8 HIGH 7% exploit odds No fix listed Auth & access Web app

What it is

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.

At a glance

Exploitability: Can be exploited over the network with a low-privilege account. High risk of data exposure, data tampering, service disruption.
Exploit odds: 7.5% chance of exploitation in the next 30 days (EPSS).
Fix: No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

2021-11-01 00:00 UTC ReservedThe CVE id was reserved by its CNA
2022-07-05 14:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 04:10 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 7.5% in the next 30 days (EPSS).
Severity: 8.8 HIGH (CVSS).
Fix: none linked yet, which raises it.

Details

Published: 2022-07-05 14:15 UTC
Last modified: 2026-06-17 04:10 UTC
Exploit probability: 7.5% · EPSS, next 30 days
Weakness: CWE-287 · Improper authentication
Record status: Modified

Affected

Alibaba Nacos ≤ 2.0.3

Attack profile CVSS 3.1 · 8.8

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2021-43116.md and follow it. Check whether this project is affected by CVE-2021-43116. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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References

NVD record · CVE.org record