What is CVE-2021-32163?

CVE-2021-32163 is a critical-severity vulnerability in Linuxfoundation Modular Open Smart Network, classified under Incorrect Authorization. CVSS score: 9.8/10. Published 2023-02-17.

How severe is CVE-2021-32163?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Linuxfoundation Modular Open Smart Network

CVE-2021-32163

Authentication vulnerability in MOSN v.0.23.0 allows attacker to escalate privileges via case-sensitive JWT authorization.

Vulnerability class: Broken Access Control

Published 2023-02-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (59.6th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Linuxfoundation Modular Open Smart Network

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

github.com/mosn/mosn/issues/1633 (Exploit, Issue Tracking, Vendor Advisory)
github.com/mosn/mosn/pull/1637 (Patch)

Frequently asked questions

What is CVE-2021-32163?: CVE-2021-32163 is a critical-severity vulnerability in Linuxfoundation Modular Open Smart Network, classified under Incorrect Authorization. CVSS score: 9.8/10. Published 2023-02-17.
How severe is CVE-2021-32163?: Critical severity. CVSS v3 base score is 9.8 out of 10.