CVE-2021-20634 Missing authorization in Cybozu Office

What is CVE-2021-20634?

CVE-2021-20634 is a medium-severity missing authorization vulnerability in Cybozu Office, published on 18 Mar 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Improper access control vulnerability in Custom App of Cybozu Office 10.0.0 to 10.8.4 allows authenticated attackers to bypass access restriction and obtain the date of Custom App via unspecified vectors.

Which versions are affected by CVE-2021-20634?

It affects 1 product.

Products include Cybozu Office.

How do I fix CVE-2021-20634?

No fix has been published for CVE-2021-20634 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2021-20634 being exploited?

There is no known exploitation of CVE-2021-20634 in the wild and no public exploit code.

Other vulnerabilities in Cybozu Office

• CVE-2016-1151 Cross-site request forgery in n/a High 8.8
• CVE-2018-0703 Path traversal in Cybozu Office High 7.5
• CVE-2018-0704 Path traversal in Cybozu Office High 7.5
• CVE-2015-8483 Open redirect in n/a High 7.4
• CVE-2024-39817 Information disclosure in Cybozu Office Medium 6.5

All Cybozu Office vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-c7h6-44jf-qvjm.