What is CVE-2023-39415?

CVE-2023-39415 is a high-severity vulnerability in Northgrid Proself, classified under Improper Authentication. CVSS score: 7.5/10. Published 2023-08-18.

How severe is CVE-2023-39415?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Northgrid Proself

CVE-2023-39415

Improper authentication vulnerability in Proself Enterprise/Standard Edition Ver5.61 and earlier, Proself Gateway Edition Ver1.62 and earlier, and Proself Mail Sanitize Edition Ver1.07 and earlier allow a remote unauthenticated attacker to log in to the product's Control Panel and perform an unintended operation.

Vulnerability class: Broken Authentication

Published 2023-08-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.010 (62.7th percentile), scored 2026-10-07.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.7% 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

Northgrid Proself
North Grid Corporation Proself Enterprise/standard Edition — versions Ver5.61 and earlier
North Grid Corporation Proself Gateway Edition — versions Ver1.62 and earlier
North Grid Corporation Proself Mail Sanitize Edition — versions Ver1.07 and earlier

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

www.proself.jp/information/149/ (Vendor Advisory)
www.proself.jp/information/150/ (Vendor Advisory)
jvn.jp/en/jp/JVN19661362/ (Third Party Advisory)

Frequently asked questions

What is CVE-2023-39415?: CVE-2023-39415 is a high-severity vulnerability in Northgrid Proself, classified under Improper Authentication. CVSS score: 7.5/10. Published 2023-08-18.
How severe is CVE-2023-39415?: High severity. CVSS v3 base score is 7.5 out of 10.