What is CVE-2020-5580?

CVE-2020-5580 is a high-severity vulnerability in Cybozu Garoon. CVSS score: 8.1/10. Published 2020-06-30.

How severe is CVE-2020-5580?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Cybozu Garoon

CVE-2020-5580

Cybozu Garoon 4.0.0 to 5.0.1 allows remote authenticated attackers to bypass access restriction to view and/or alter Single sign-on settings via unspecified vectors.

Published 2020-06-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.011 (64.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.3% 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 5.0.1

References

kb.cybozu.support/article/36391 (Vendor Advisory)
jvn.jp/en/jp/JVN55497111/index.html (Third Party Advisory)

Frequently asked questions

What is CVE-2020-5580?: CVE-2020-5580 is a high-severity vulnerability in Cybozu Garoon. CVSS score: 8.1/10. Published 2020-06-30.
How severe is CVE-2020-5580?: High severity. CVSS v3 base score is 8.1 out of 10.