What is CVE-2023-33236?

CVE-2023-33236 is a critical-severity vulnerability in Moxa Mxsecurity, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2023-05-22.

How severe is CVE-2023-33236?

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

Vulnerability in Moxa Mxsecurity

CVE-2023-33236

MXsecurity version 1.0 is vulnearble to hardcoded credential vulnerability. This vulnerability has been reported that can be exploited to craft arbitrary JWT tokens and subsequently bypass authentication for web-based APIs.

Published 2023-05-22 · 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: 0.010 (61.7th percentile), scored 2026-10-23.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 62nd percentile — 61.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Moxa Mxsecurity — versions 1.0
Moxa Mxsecurity Series — versions 1.0

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

References

www.moxa.com/en/support/product-support/security-advisory/mxsecurity-command-in… (vendor-advisory, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2023-33236?: CVE-2023-33236 is a critical-severity vulnerability in Moxa Mxsecurity, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2023-05-22.
How severe is CVE-2023-33236?: Critical severity. CVSS v3 base score is 9.8 out of 10.