Auth bypass in Alibaba Nacos
CVE-2021-43116
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.075 (94.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.076 · newest: 0.075 · change: -0.001
Affected products
Weakness classification (CWE)
References
- github.com/alibaba/nacos/issues/7127 (Exploit, Third Party Advisory, Issue Tracking)
- github.com/alibaba/nacos/issues/7182 (Exploit, Third Party Advisory, Issue Tracking)
- packetstormsecurity.com/files/171638/Nacos-2.0.3-Access-Control.html
Frequently asked questions
- What is CVE-2021-43116?
- CVE-2021-43116 is a high-severity vulnerability in Alibaba Nacos, classified under Improper Authentication. CVSS score: 8.8/10. Published 2022-07-05.
- How severe is CVE-2021-43116?
- High severity. CVSS v3 base score is 8.8 out of 10.