Tuesday, October 26, 2021

CVE-2021-39221

Description

Nextcloud is an open-source, self-hosted productivity platform. The Nextcloud Contacts application prior to version 4.0.3 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 Contacts application is upgraded to 4.0.3. As a workaround, one may use a browser that has support for Content-Security-Policy.

References to Advisories, Solutions, and Tools


References to Advisories, Solutions, and Tools

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Resourcehttps://github.com/nextcloud/contacts/pull/2407https://github.com/nextcloud/security-advisories/security/advisories/GHSA-j6cx-mxqf-f9vc
 

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thank you Templateism for the design - You should have written the code a little more complicated - Nothing Encrypted anymore