What is CVE-2018-0551?

CVE-2018-0551 is a medium-severity vulnerability in Cybozu Garoon, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2018-04-16.

How severe is CVE-2018-0551?

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

XSS in Cybozu Garoon

CVE-2018-0551

Cross-site scripting vulnerability in Cybozu Garoon 3.0.0 to 4.6.1 allows remote authenticated attackers to inject arbitrary web script or HTML via unspecified vectors.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-04-16 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.006 (48.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.7% 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: 0.006 · change: -0.000

Affected products

Cybozu Garoon
Cybozu, Inc. Cybozu Garoon — versions 3.0.0 to 4.6.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

support.cybozu.com/ja-jp/article/10211 (Vendor Advisory)
jvn.jp/en/jp/JVN65268217/index.html (VDB Entry, Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2018-0551?: CVE-2018-0551 is a medium-severity vulnerability in Cybozu Garoon, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2018-04-16.
How severe is CVE-2018-0551?: Medium severity. CVSS v3 base score is 5.4 out of 10.