Is CVE-2021-32163 actively exploited?

No active exploitation of CVE-2021-32163 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-32163 be exploited remotely?

Yes. CVE-2021-32163 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-32163?

CVE-2021-32163 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2021-32163

CWE-863Published: February 17, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

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

NVD Source

Risk Analysis

MOSN contains an authentication vulnerability where case-sensitive JWT authorization can be bypassed to escalate privileges. This critical flaw allows unauthorized access and control.

No public exploit is known, and it is not in the KEV. The vulnerability is remotely exploitable.

Recommended Action

Users should update MOSN to a version that properly handles JWT case sensitivity.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2021-32163 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.