CVE-2021-32163

FAUCET Score

CVE-2021-32163 is a critical authentication vulnerability (CVSS 9.8) affecting MOSN v.0.23.0, allowing unauthenticated attackers to escalate privileges due to case-sensitive JWT authorization. This flaw could lead to complete compromise of confidentiality, integrity, and availability. While the vulnerability is severe, there is currently no evidence of active exploitation, public exploit code, or significant community discussion.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 0.23.0CPE matchmatch criteria	cpe:2.3:a:linuxfoundation:modular_open_smart_network::::::::

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

Exploitability Score

3.9

Impact Score

5.9

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.95%

Probability of exploitation in next 30 days

EPSS Percentile

57.5%

Percentile rank of EPSS score among Peer Group

As of 2026-07-28

Model: v2026.06.15

This CVE's current EPSS score of 0.0095 is in the 42nd percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference

View patch

gopatch availablevia ghsa

Product: mosn.io/mosnFixed in: 0.23.0

Vendor Advisories (1)

goGHSA-5vx9-j5cw-47vqcritical

Privilege escalation in MOSN

Feb 17, 2023

References

github.com / mosn/mosn/issues/1633

ExploitIssue TrackingVendor Advisory

github.com / mosn/mosn/pull/1637

Patch