CVE-2021-20797

Name: CVE-2021-20797
Creator: NVD / NIST
Published: 2021-10-13T09:15:07.807+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.59%

Last modified Jun 17, 2026

CVE-2021-20797 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Cross-site script inclusion vulnerability in the management screen of Cybozu Remote Service 3.1.8 allows a remote authenticated attacker to obtain the information stored in the product. This issue occurs only when using Mozilla Firefox.. EPSS estimates a 0.59% chance of exploitation in the next 30 days.

Description

Cross-site script inclusion vulnerability in the management screen of Cybozu Remote Service 3.1.8 allows a remote authenticated attacker to obtain the information stored in the product. This issue occurs only when using Mozilla Firefox.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.59%

43.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Cybozu	Remote Service Manager	3.1.8

References

https://jvn.jp/en/jp/JVN52694228/index.htmlThird Party Advisory
https://kb.cybozu.support/article/37429Vendor Advisory
https://jvn.jp/en/jp/JVN52694228/index.htmlThird Party Advisory
https://kb.cybozu.support/article/37429Vendor Advisory

Timeline

Published: Oct 13, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-20797?

How severe is CVE-2021-20797?

CVE-2021-20797 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.59% probability of exploitation in the next 30 days.

How do I fix CVE-2021-20797?

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-2021-20797?

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

Scan your code now

Source: NVD / NIST