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.
How to fix
- nextcloud contacts4.0.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| nextcloud contacts | v < 4.0.3 | 4.0.3 |
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Attack Surface Management
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