CVE-2021-32782: Nextcloud Circles

Medium severity, CVSS 5.4. EPSS: 0.8% chance of exploitation in the next 30 days.

Nextcloud Circles is an open source social network built for the nextcloud ecosystem. In affected versions the Nextcloud Circles application is vulnerable to a stored Cross-Site Scripting (XSS) vulnerability. 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 Circles application is upgraded to 0.21.3, 0.20.10 or 0.19.14 to resolve this issue. As a workaround users may use a browser that has support for Content-Security-Policy. A notable exemption is Internet Explorer which does not support CSP properly.

Affected products

• Nextcloud Circles: before 0.19.14 (fixed in 0.19.14); from 0.20.0, before 0.20.10 (fixed in 0.20.10); from 0.21.0, before 0.21.3 (fixed in 0.21.3)

Published 2021-09-07. Last modified 2026-06-17.