CVE-2021-32766
Nextcloud Text Public Link Share Folder Enumeration
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.
INFO
Published Date :
Sept. 7, 2021, 9:15 p.m.
Last Modified :
Sept. 27, 2022, 3:43 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-32766.
| URL | Resource |
|---|---|
| https://github.com/nextcloud/security-advisories/security/advisories/GHSA-gcf3-3wmc-88jr | Third Party Advisory |
| https://github.com/nextcloud/text/pull/1716 | Patch Third Party Advisory |
| https://hackerone.com/reports/1253475 | Permissions Required Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-32766 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-32766 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Reanalysis by [email protected]
Sep. 27, 2022
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:nextcloud:nextcloud:*:*:*:*:*:*:*:* versions up to (excluding) 20.0.12 *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* versions from (including) 21.0.0 up to (excluding) 21.0.4 *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* versions from (including) 22.0.0 up to (excluding) 22.1.0 OR *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* versions up to (excluding) 20.0.12 *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* versions from (including) 21.0.0 up to (excluding) 21.0.4 *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* versions from (including) 22.0.0 up to (excluding) 22.1.0 -
CPE Deprecation Remap by [email protected]
Sep. 27, 2022
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:nextcloud:nextcloud:*:*:*:*:*:*:*:* versions from (including) 22.0.0 from (excluding) 22.1.0 OR *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* versions from (including) 22.0.0 from (excluding) 22.1.0 -
CPE Deprecation Remap by [email protected]
Sep. 27, 2022
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:nextcloud:nextcloud:*:*:*:*:*:*:*:* versions from (including) 21.0.0 from (excluding) 21.0.4 OR *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* versions from (including) 21.0.0 from (excluding) 21.0.4 -
Initial Analysis by [email protected]
Sep. 14, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:N/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Changed Reference Type https://github.com/nextcloud/security-advisories/security/advisories/GHSA-gcf3-3wmc-88jr No Types Assigned https://github.com/nextcloud/security-advisories/security/advisories/GHSA-gcf3-3wmc-88jr Third Party Advisory Changed Reference Type https://github.com/nextcloud/text/pull/1716 No Types Assigned https://github.com/nextcloud/text/pull/1716 Patch, Third Party Advisory Changed Reference Type https://hackerone.com/reports/1253475 No Types Assigned https://hackerone.com/reports/1253475 Permissions Required, Third Party Advisory Added CWE NIST CWE-209 Added CPE Configuration OR *cpe:2.3:a:nextcloud:nextcloud:*:*:*:*:*:*:*:* versions up to (excluding) 20.0.12 *cpe:2.3:a:nextcloud:nextcloud:*:*:*:*:*:*:*:* versions from (including) 21.0.0 up to (excluding) 21.0.4 *cpe:2.3:a:nextcloud:nextcloud:*:*:*:*:*:*:*:* versions from (including) 22.0.0 up to (excluding) 22.1.0
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-32766 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-32766
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.09 }} 0.01%
score
0.36459
percentile