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.
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:nextcloud:talk:*:*:*:*:*:*:*:*
cpe:2.3:a:nextcloud:talk:*:*:*:*:*:*:*:*
cpe:2.3:a:nextcloud:talk:*:*:*:*:*:*:*:*

History

21 Nov 2024, 06:18

Type Values Removed Values Added
CVSS v2 : 4.3
v3 : 6.1
v2 : 4.3
v3 : 6.4
References () https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xhxq-f4vg-jw5g - Third Party Advisory () https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xhxq-f4vg-jw5g - Third Party Advisory
References () https://github.com/nextcloud/spreed/pull/542 - Third Party Advisory () https://github.com/nextcloud/spreed/pull/542 - Third Party Advisory
References () https://hackerone.com/reports/1135481 - Permissions Required, Third Party Advisory () https://hackerone.com/reports/1135481 - Permissions Required, Third Party Advisory

Information

Published : 2021-11-15 19:15

Updated : 2024-11-21 06:18


NVD link : CVE-2021-39222

Mitre link : CVE-2021-39222

CVE.ORG link : CVE-2021-39222


JSON object : View

Products Affected

nextcloud

  • talk
CWE
CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CWE-434

Unrestricted Upload of File with Dangerous Type