CVE Vulnerability

CVE-2021-39222

Nextcloud is an open-source, self-hosted productivity platform. The Nextcloud Talk application was vulnerable to a stored Cross-Site Scripting (XSS) vulnerability. For exploitation, a user would need to right-click on a malicious file and open the file in a new tab. Due the strict Content-Security-Policy shipped with Nextcloud, this issue is not exploitable on modern browsers supporting Content-Security-Policy. It is recommended that the Nextcloud Talk application is upgraded to patched versions 10.0.7, 10.1.4, 11.1.2, 11.2.0 or 12.0.0. As a workaround, use a browser that has support for Content-Security-Policy.

4.3 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

Scope

6.1 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References
Link Resource
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xhxq-f4vg-jw5g Third Party Advisory
https://hackerone.com/reports/1135481 Permissions Required Third Party Advisory
https://github.com/nextcloud/spreed/pull/542 Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:nextcloud:talk:*:*:*:*:*:*:*:*
cpe:2.3:a:nextcloud:talk:*:*:*:*:*:*:*:*
cpe:2.3:a:nextcloud:talk:*:*:*:*:*:*:*:*
Information

Published : 2021-11-15 07:15

Updated : 2021-11-17 06:43

NVD link : CVE-2021-39222

Mitre link : CVE-2021-39222

Products Affected
No products.
CWE
CWE-79