What is CVE-2026-20711?

CVE-2026-20711 is a medium-severity vulnerability in Cybozu Garoon, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-02-02.

How severe is CVE-2026-20711?

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

XSS in Cybozu Garoon

CVE-2026-20711

Cross-site scripting vulnerability exists in E-mail function of Cybozu Garoon 5.0.0 to 6.0.3, which may allow an attacker to reset arbitrary users’ passwords.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (13.3th percentile) — read the EPSS interpretation.

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.

Affected products

Cybozu Garoon
Cybozu, Inc. Cybozu Garoon — versions 5.0.0 to 6.0.3

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

vultures@jpcert.or.jp (Vendor Advisory)
vultures@jpcert.or.jp (Third Party Advisory)

Frequently asked questions

What is CVE-2026-20711?: CVE-2026-20711 is a medium-severity vulnerability in Cybozu Garoon, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-02-02.
How severe is CVE-2026-20711?: Medium severity. CVSS v3 base score is 6.1 out of 10.