What is CVE-2021-39224?

CVE-2021-39224 is a vulnerability in Nextcloud OfficeOnline prior to version 1.1.1 that could result in a full path disclosure on shared files.

What is the severity of CVE-2021-39224?

The severity of CVE-2021-39224 is medium with a CVSS score of 5.3.

How does CVE-2021-39224 impact Nextcloud OfficeOnline?

CVE-2021-39224 can allow an attacker to see the full path of shared files, potentially exposing sensitive information.

How can I fix CVE-2021-39224?

To fix CVE-2021-39224, upgrade Nextcloud OfficeOnline to version 1.1.1 or later.

Where can I find more information about CVE-2021-39224?

You can find more information about CVE-2021-39224 in the following references: [link1](https://github.com/nextcloud/officeonline/pull/204) [link2](https://github.com/nextcloud/security-advisories/security/advisories/GHSA-56wm-r6jm-3v9h)

Vulnerability/
CVE-2021-39224

medium

5.3

CWE

200

25/10/2021

4/8/2024

CVE-2021-39224: File path disclosure of shared files in OfficeOnline application

First published: Mon Oct 25 2021(Updated: )

Nextcloud is an open-source, self-hosted productivity platform. The Nextcloud OfficeOnline application prior to version 1.1.1 returned verbatim exception messages to the user. This could result in a full path disclosure on shared files. (e.g. an attacker could see that the file `shared.txt` is located within `/files/$username/Myfolder/Mysubfolder/shared.txt`). It is recommended that the OfficeOnline application is upgraded to 1.1.1. As a workaround, one may disable the OfficeOnline application in the app settings.

Credit: security-advisories@github.com

Affected Software	Affected Version	How to fix
Nextcloud OfficeOnline	<1.1.1

Remedy

https://github.com/nextcloud/officeonline/pull/204

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Frequently Asked Questions

What is CVE-2021-39224?
CVE-2021-39224 is a vulnerability in Nextcloud OfficeOnline prior to version 1.1.1 that could result in a full path disclosure on shared files.
What is the severity of CVE-2021-39224?
The severity of CVE-2021-39224 is medium with a CVSS score of 5.3.
How does CVE-2021-39224 impact Nextcloud OfficeOnline?
CVE-2021-39224 can allow an attacker to see the full path of shared files, potentially exposing sensitive information.
How can I fix CVE-2021-39224?
To fix CVE-2021-39224, upgrade Nextcloud OfficeOnline to version 1.1.1 or later.
Where can I find more information about CVE-2021-39224?
You can find more information about CVE-2021-39224 in the following references: [link1](https://github.com/nextcloud/officeonline/pull/204) [link2](https://github.com/nextcloud/security-advisories/security/advisories/GHSA-56wm-r6jm-3v9h)

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