CVE-2021-32733

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.

• CWE-79
• CWE-79

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-x4w3-jhcr-57pqThird Party Advisory
• https://github.com/nextcloud/text/pull/1689Patch, Third Party Advisory
• https://hackerone.com/reports/1241460Permissions Required
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-x4w3-jhcr-57pqThird Party Advisory
• https://github.com/nextcloud/text/pull/1689Patch, Third Party Advisory
• https://hackerone.com/reports/1241460Permissions Required

Published

Jul 12, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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