What is CVE-2019-5966?

CVE-2019-5966 is a medium-severity vulnerability in Joruri Mail, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.4/10. Published 2019-07-05.

How severe is CVE-2019-5966?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Auth bypass in Joruri Mail

CVE-2019-5966

Joruri Mail 2.1.4 and earlier does not properly manage sessions, which allows remote attackers to impersonate an arbitrary user and alter/disclose the information via unspecified vectors.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2019-07-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.010 (62.7th percentile), scored 2026-10-01.

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

Joruri Mail
Sitebridge Inc. Joruri Mail — versions 2.1.4 and earlier

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

joruri.org/docs/2018060400041/ (Vendor Advisory)
jvn.jp/en/jp/JVN58052567/index.html (Third Party Advisory)

Frequently asked questions

What is CVE-2019-5966?: CVE-2019-5966 is a medium-severity vulnerability in Joruri Mail, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.4/10. Published 2019-07-05.
How severe is CVE-2019-5966?: Medium severity. CVSS v3 base score is 5.4 out of 10.