What is CVE-2021-39222?

CVE-2021-39222 is a Cross-Site Scripting (XSS) vulnerability in the Nextcloud Talk application.

What is the severity of CVE-2021-39222?

The severity of CVE-2021-39222 is medium with a CVSS score of 6.1.

How can CVE-2021-39222 be exploited?

To exploit CVE-2021-39222, a user needs to right-click on a malicious file and open it in a new tab.

Which versions of Nextcloud Talk are affected?

Versions 10.0.7 to 10.1.4 and versions 11.0.0 to 11.1.2 of Nextcloud Talk are affected by CVE-2021-39222.

Are there any references for CVE-2021-39222?

Yes, you can find more information about CVE-2021-39222 on the following references: [1] [2] [3].

Vulnerability/
CVE-2021-39222

medium

6.4

CWE

79 434

15/11/2021

4/8/2024

CVE-2021-39222: XSS in Talk

First published: Mon Nov 15 2021(Updated: )

Nextcloud is an open-source, self-hosted productivity platform. The Nextcloud Talk application was vulnerable to a stored Cross-Site Scripting (XSS) vulnerability. For exploitation, a user would need to right-click on a malicious file and open the file in a new tab. Due the strict Content-Security-Policy shipped with Nextcloud, this issue is not exploitable on modern browsers supporting Content-Security-Policy. It is recommended that the Nextcloud Talk application is upgraded to patched versions 10.0.7, 10.1.4, 11.1.2, 11.2.0 or 12.0.0. As a workaround, use a browser that has support for Content-Security-Policy.

Credit: security-advisories@github.com

Affected Software	Affected Version	How to fix
Nextcloud talk	<10.0.7
Nextcloud talk	>=10.1.0<10.1.4
Nextcloud talk	>=11.0.0<11.1.2

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Frequently Asked Questions

What is CVE-2021-39222?
CVE-2021-39222 is a Cross-Site Scripting (XSS) vulnerability in the Nextcloud Talk application.
What is the severity of CVE-2021-39222?
The severity of CVE-2021-39222 is medium with a CVSS score of 6.1.
How can CVE-2021-39222 be exploited?
To exploit CVE-2021-39222, a user needs to right-click on a malicious file and open it in a new tab.
Which versions of Nextcloud Talk are affected?
Versions 10.0.7 to 10.1.4 and versions 11.0.0 to 11.1.2 of Nextcloud Talk are affected by CVE-2021-39222.
Are there any references for CVE-2021-39222?
Yes, you can find more information about CVE-2021-39222 on the following references: [1] [2] [3].

collector/nvd-index
agent/softwarecombine
agent/weakness
collector/mitre-cve
source/MITRE
agent/last-modified-date
agent/title
agent/references
agent/author
agent/severity
agent/tags
agent/type
agent/description
agent/first-publish-date
agent/event
vendor/nextcloud
canonical/nextcloud talk
version/nextcloud talk/10.1.0
version/nextcloud talk/11.0.0

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