Information Exposure Affecting nextcloud package, versions [,20.0.12)[21.0.0,21.0.4)[22.0.0,22.1.0)


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.12% (47th percentile)

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  • Snyk IDSNYK-UNMANAGED-NEXTCLOUD-2371449
  • published26 Jan 2022
  • disclosed7 Sept 2021
  • creditUnknown

Introduced: 7 Sep 2021

CVE-2021-32766  (opens in a new tab)
CWE-209  (opens in a new tab)

How to fix?

Upgrade nextcloud to version 20.0.12, 21.0.4, 22.1.0 or higher.

Overview

Affected versions of this package are vulnerable to Information Exposure. Nextcloud Text is an open source plaintext editing application which ships with the nextcloud server. In affected versions the Nextcloud Text application returned different error messages depending on whether a folder existed in a public link share. This is problematic in case the public link share has been created with "Upload Only" privileges. (aka "File Drop"). A link share recipient is not expected to see which folders or files exist in a "File Drop" share. Using this vulnerability an attacker is able to enumerate folders in such a share. Exploitation requires that the attacker has access to a valid affected "File Drop" link share. It is recommended that the Nextcloud Server is upgraded to 20.0.12, 21.0.4 or 22.0.1. Users who are unable to upgrade are advised to disable the Nextcloud Text application in the app settings.

CVSS Scores

version 3.1