What is CVE-2023-22333?

CVE-2023-22333 is a medium-severity vulnerability in First Net Japan Inc. Easymail, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2023-01-30.

How severe is CVE-2023-22333?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in First Net Japan Inc. Easymail

CVE-2023-22333

Cross-site scripting vulnerability in EasyMail 2.00.130 and earlier allows a remote unauthenticated attacker to inject an arbitrary script.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-01-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (41.1th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

First Net Japan Inc. Easymail — versions 2.00.130 and earlier
Mubag Easymail

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.mubag.com/download/ (Vendor Advisory)
jvn.jp/en/jp/JVN05288621/ (Third Party Advisory)

Frequently asked questions

What is CVE-2023-22333?: CVE-2023-22333 is a medium-severity vulnerability in First Net Japan Inc. Easymail, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2023-01-30.
How severe is CVE-2023-22333?: Medium severity. CVSS v3 base score is 6.1 out of 10.