What is CVE-2024-31400?

CVE-2024-31400 is a medium-severity vulnerability in Cybozu Garoon, classified under CWE-922. CVSS score: 6.5/10. Published 2024-06-11.

How severe is CVE-2024-31400?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Cybozu Garoon

CVE-2024-31400

Insertion of sensitive information into sent data issue exists in Cybozu Garoon 5.0.0 to 5.15.0. If this vulnerability is exploited, unintended data may be left in forwarded mail.

Published 2024-06-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (18.7th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Cybozu Garoon
Cybozu, Inc. Cybozu Garoon — versions 5.0.0 to 5.15.0

Weakness classification (CWE)

CWE-922

References

cs.cybozu.co.jp/2024/007901.html (Vendor Advisory)
jvn.jp/en/jp/JVN28869536/ (Third Party Advisory)

Frequently asked questions

What is CVE-2024-31400?: CVE-2024-31400 is a medium-severity vulnerability in Cybozu Garoon, classified under CWE-922. CVSS score: 6.5/10. Published 2024-06-11.
How severe is CVE-2024-31400?: Medium severity. CVSS v3 base score is 6.5 out of 10.