What is CVE-2023-22278?

CVE-2023-22278 is a medium-severity vulnerability in Daj M-Filter, classified under Improper Authentication. CVSS score: 5.3/10. Published 2023-01-17.

How severe is CVE-2023-22278?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Daj M-Filter

CVE-2023-22278

m-FILTER prior to Ver.5.70R01 (Ver.5 Series) and m-FILTER prior to Ver.4.87R04 (Ver.4 Series) allows a remote unauthenticated attacker to bypass authentication and send users' unintended email when email is being sent under the certain conditions. The attacks exploiting this vulnerability have been observed.

Vulnerability class: Broken Authentication

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

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (51.6th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Daj M-Filter
Digital Arts Inc. M-Filter Ver.5 Series And Ver.4 — versions m-FILTER prior to Ver.5.70R01 (Ver.5 Series) and m-FILTER prior to Ver.4.87R04 (Ver.4 Series)

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

jvn.jp/en/jp/JVN55675303/index.html (Third Party Advisory)

Frequently asked questions

What is CVE-2023-22278?: CVE-2023-22278 is a medium-severity vulnerability in Daj M-Filter, classified under Improper Authentication. CVSS score: 5.3/10. Published 2023-01-17.
How severe is CVE-2023-22278?: Medium severity. CVSS v3 base score is 5.3 out of 10.