PT-2021-19928 · Nextcloud+1 · Nextcloud Circles+1

Lukas Reschke · Published 2021-09-07 · Updated 2021-09-10 · CVE-2021-32782

Positive Technologies (AI Summary)

CVSS v3.1

5.8

Medium

Base vector

AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions Nextcloud Circles versions prior to 0.19.14 Nextcloud Circles versions prior to 0.20.10 Nextcloud Circles versions prior to 0.21.3

Description The Nextcloud Circles application is vulnerable to a stored Cross-Site Scripting (XSS) issue. Due to the strict Content-Security-Policy shipped with Nextcloud, this issue is not exploitable on modern browsers supporting Content-Security-Policy. A notable exemption is Internet Explorer, which does not support Content-Security-Policy properly.

Recommendations For versions prior to 0.19.14, upgrade to 0.19.14 to resolve this issue. For versions prior to 0.20.10, upgrade to 0.20.10 to resolve this issue. For versions prior to 0.21.3, upgrade to 0.21.3 to resolve this issue. As a temporary workaround, users may use a browser that has support for Content-Security-Policy.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-32782

GHSA-HGPQ-28GJ-JRJ9

Affected Products

Internet Explorer

Nextcloud Circles

References · 6

• https://github.com/nextcloud/circles/commit/dbb97a83ccb342c839a54f088aa19b8ba6844b0e · Patch
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hgpq-28gj-jrj9 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-32782 · Security Note
• https://osv.dev/vulnerability/CVE-2021-32782 · Vendor Advisory
• https://hackerone.com/reports/1217606 · Note
• https://t.me/cibsecurity/28398 · Telegram Post