CVE-2021-32733
Last modified
CVE-2021-32733 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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. EPSS estimates a 1.11% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Nextcloud | Nextcloud Server | < 19.0.13 |
| Nextcloud | Nextcloud Server | >= 20.0.0, < 20.0.11 |
| Nextcloud | Nextcloud Server | >= 21.0.0, < 21.0.3 |
References
- https://github.com/nextcloud/text/pull/1689Patch, Third Party Advisory
- https://hackerone.com/reports/1241460Permissions Required
- https://github.com/nextcloud/text/pull/1689Patch, Third Party Advisory
- https://hackerone.com/reports/1241460Permissions Required
Timeline
- Published
- Last Modified
- Status
- Modified
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