CVE-2021-32766
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.
EPSS 0.38% · 60.0th percentile
Risk Scores
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| nextcloud | nextcloud_server | 21.0.0, 22.0.0, 0 |
| nextcloud | security-advisories | < 20.0.12, >= 22.0.0, < 22.0.1, * |
Exploit Intelligence
Timeline
- Sep 6, 2021 CVE Published
- Sep 8, 2021 EPSS Score
- Nov 5, 2021 EPSS Score
- Jan 1, 2022 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 28, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- Apr 27, 2022 EPSS Score
- Jun 24, 2022 EPSS Score
- Aug 21, 2022 EPSS Score
- Oct 18, 2022 EPSS Score
- Dec 15, 2022 EPSS Score
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hgpq-28gj-jrj9 advisory
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-gv5w-8q25-785v advisory
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-56j9-3rj4-wvgm advisory
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-gcf3-3wmc-88jr advisory
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-pxhh-954f-8w7w advisory
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-mcpf-v65v-359h advisory
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-m682-v4g9-wrq7 advisory
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-gvvr-h36p-8mjx advisory
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4mxp-j277-82hr advisory
- https://github.com/nextcloud/text/pull/1716 url
- https://hackerone.com/reports/1253475 url