CVE-2021-39224 Information

Description

Nextcloud is an open-source self-hosted productivity platform. The Nextcloud OfficeOnline application prior to version 1.1.1 returned verbatim exception messages to the user. This could result in a full path disclosure on shared files. (e.g. an attacker could see that the file shared.txt is located within /files/$username/Myfolder/Mysubfolder/shared.txt). It is recommended that the OfficeOnline application is upgraded to 1.1.1. As a workaround one may disable the OfficeOnline application in the app settings.

CVSS Vector

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

Reference

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-56wm-r6jm-3v9h https://github.com/nextcloud/officeonline/pull/204

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

NONE

Base Severity

5.3