What is CVE-2019-5978?

CVE-2019-5978 is a medium-severity vulnerability in Cybozu Garoon, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2019-09-12.

How severe is CVE-2019-5978?

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

Open Redirect in Cybozu Garoon

CVE-2019-5978

Open redirect vulnerability in Cybozu Garoon 4.0.0 to 4.10.2 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via the application 'Scheduler'.

Vulnerability class: Open Redirect

Published 2019-09-12 · 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: 0.011 (64.9th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Cybozu Garoon
Cybozu, Inc. Cybozu Garoon — versions 4.0.0 to 4.10.2

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

jvn.jp/en/jp/JVN62618482/index.html (Third Party Advisory)
kb.cybozu.support/article/35916 (Vendor Advisory)

Frequently asked questions

What is CVE-2019-5978?: CVE-2019-5978 is a medium-severity vulnerability in Cybozu Garoon, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2019-09-12.
How severe is CVE-2019-5978?: Medium severity. CVSS v3 base score is 6.1 out of 10.