CVE-2021-32655

 

Published at: - 01-06-2021 11:15

Last modified: - 26-10-2022 04:09

Total changes: - 6

Description

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N

 

Verification logic

 

Reference

• https://hackerone.com/reports/1167929
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-grph-cm44-p3jv
• GLSA-202208-17-Third Party Advisory

 

Keywords

NVD

 

CVE-2021-32655

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures