What is the severity of CVE-2021-32655?

CVE-2021-32655 has been classified as a medium severity vulnerability.

How do I fix CVE-2021-32655?

To fix CVE-2021-32655, upgrade Nextcloud Server to versions 19.0.11, 20.0.10, or 21.0.2 or later.

What are the consequences of CVE-2021-32655 if exploited?

Exploitation of CVE-2021-32655 may allow an attacker to convert a Files Drop link to a federated share, affecting user sharing experiences.

Which versions of Nextcloud Server are affected by CVE-2021-32655?

CVE-2021-32655 affects Nextcloud Server versions prior to 19.0.11, 20.0.10, and 21.0.2.

Is there a workaround for CVE-2021-32655?

There is no official workaround for CVE-2021-32655 other than applying the necessary updates.

Vulnerability/
CVE-2021-32655

low

3.5

CWE

241

1/6/2021

3/8/2024

CVE-2021-32655: Files Drop public link can be added as federated share

First published: Tue Jun 01 2021(Updated: )

Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.11, 20.0.10, and 21.0.2, an attacker is able to convert a Files Drop link to a federated share. This causes an issue on the UI side of the sharing user. When the sharing user opens the sharing panel and tries to remove the "Create" privileges of this unexpected share, Nextcloud server would silently grant the share read privileges. The vulnerability is patched in versions 19.0.11, 20.0.10 and 21.0.2. No workarounds are known to exist.

Credit: security-advisories@github.com

Affected Software	Affected Version	How to fix
Nextcloud Nextcloud Server	<19.0.11
Nextcloud Nextcloud Server	>=20.0.0<20.0.10
Nextcloud Nextcloud Server	>=21.0.0<21.0.2

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Frequently Asked Questions

What is the severity of CVE-2021-32655?
CVE-2021-32655 has been classified as a medium severity vulnerability.
How do I fix CVE-2021-32655?
To fix CVE-2021-32655, upgrade Nextcloud Server to versions 19.0.11, 20.0.10, or 21.0.2 or later.
What are the consequences of CVE-2021-32655 if exploited?
Exploitation of CVE-2021-32655 may allow an attacker to convert a Files Drop link to a federated share, affecting user sharing experiences.
Which versions of Nextcloud Server are affected by CVE-2021-32655?
CVE-2021-32655 affects Nextcloud Server versions prior to 19.0.11, 20.0.10, and 21.0.2.
Is there a workaround for CVE-2021-32655?
There is no official workaround for CVE-2021-32655 other than applying the necessary updates.

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vendor/nextcloud
canonical/nextcloud nextcloud server
version/nextcloud nextcloud server/20.0.0
version/nextcloud nextcloud server/21.0.0

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