CVE-2021-32653 Information

Description

Nextcloud Server is a Nextcloud package that handles data storage. Nextcloud Server versions prior to 19.0.11 20.0.10 or 21.0.2 send user IDs to the lookup server even if the user has no fields set to published. The vulnerability is patched in versions 19.0.11 20.0.10 and 21.0.2; no workarounds outside the updates are known to exist.

CVSS Vector

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

Reference

https://hackerone.com/reports/1173436 https://github.com/nextcloud/security-advisories/security/advisories/GHSA-396j-vqpr-qg45

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction Required

HIGH

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

NONE

Base Severity

2.7