CVE-2021-20758

Name: CVE-2021-20758
Creator: NVD / NIST
Published: 2021-08-18T06:15:06.767+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8/10EPSS 0.49%

Last modified Jun 17, 2026

CVE-2021-20758 is a high-severity vulnerability rated 8/10 on the CVSS scale. Cross-site request forgery (CSRF) vulnerability in Message of Cybozu Garoon 4.0.0 to 5.0.2 allows a remote authenticated attacker to hijack the authentication of administrators and perform an arbitrary operation via unspecified vectors.. EPSS estimates a 0.49% chance of exploitation in the next 30 days.

Description

Cross-site request forgery (CSRF) vulnerability in Message of Cybozu Garoon 4.0.0 to 5.0.2 allows a remote authenticated attacker to hijack the authentication of administrators and perform an arbitrary operation via unspecified vectors.

Metrics

CVSS 3.1

8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

0.49%

38.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-352

Affected Software

Vendor	Product	Versions
Cybozu	Garoon	>= 4.0.0, <= 5.0.2

References

https://cs.cybozu.co.jp/2021/007206.htmlVendor Advisory
https://jvn.jp/en/jp/JVN54794245/index.htmlThird Party Advisory
https://cs.cybozu.co.jp/2021/007206.htmlVendor Advisory
https://jvn.jp/en/jp/JVN54794245/index.htmlThird Party Advisory

Timeline

Published: Aug 18, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-20758?

How severe is CVE-2021-20758?

CVE-2021-20758 has a CVSS score of 8/10 (HIGH severity). The EPSS model estimates a 0.49% probability of exploitation in the next 30 days.

How do I fix CVE-2021-20758?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-20758?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST