CVE-2021-32733
Description
Nextcloud Text is a collaborative document editing application that uses Markdown. A cross-site scripting vulnerability is present in versions prior to 19.0.13, 20.0.11, and 21.0.3. The Nextcloud Text application shipped with Nextcloud server used a `text/html` Content-Type when serving files to users. Due the strict Content-Security-Policy shipped with Nextcloud, this issue is not exploitable on modern browsers supporting Content-Security-Policy. The issue was fixed in versions 19.0.13, 20.0.11, and 21.0.3. As a workaround, use a browser that has support for Content-Security-Policy.
How to fix
- nextcloud nextcloud_server19.0.13, 20.0.11, 21.0.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| nextcloud nextcloud_server | v < 19.0.13, 20.0.0 ≤ v < 20.0.11, 21.0.0 ≤ v < 21.0.3 | 19.0.13, 20.0.11, 21.0.3 |
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Attack Surface Management
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