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CVE-2021-32766

MEDIUM
5.3

Description

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.

CVE Details

CVSS v3.1 Score5.3
SeverityMEDIUM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack VectorNETWORK
ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
Published9/7/2021
Last Modified11/21/2024
Sourcenvd
Honeypot Sightings0

Affected Products

nextcloud:nextcloud_server

Weaknesses (CWE)

CWE-209CWE-209

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-gcf3-3wmc-88jr(security-advisories@github.com)
https://github.com/nextcloud/text/pull/1716(security-advisories@github.com)
https://hackerone.com/reports/1253475(security-advisories@github.com)
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-gcf3-3wmc-88jr(af854a3a-2127-422b-91ae-364da2661108)
https://github.com/nextcloud/text/pull/1716(af854a3a-2127-422b-91ae-364da2661108)
https://hackerone.com/reports/1253475(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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