Description
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.
References (3)
Core 3
Core References
Patch, Third Party Advisory x_refsource_confirm
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hgpq-28gj-jrj9
Patch, Third Party Advisory x_refsource_misc
https://github.com/nextcloud/circles/commit/dbb97a83ccb342c839a54f088aa19b8ba6844b0e
Permissions Required, Third Party Advisory x_refsource_misc
https://hackerone.com/reports/1217606
Scores
CVSS v3
5.8
EPSS
0.0036
EPSS Percentile
58.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:N/A:N
Details
CWE
CWE-79
Status
published
Products (1)
nextcloud/circles
< 0.19.14
Published
Sep 07, 2021
Tracked Since
Feb 18, 2026