PT-2021-12723 · Microsoft+3 · Internet Explorer+3

Verg · Published 2021-02-03 · Updated 2021-11-03 · CVE-2020-8294

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions: Nextcloud Server versions prior to 20.0.2 Nextcloud Server versions prior to 19.0.5 Nextcloud Server versions prior to 18.0.11

Description: A missing link validation allows execution of a stored XSS attack when saving a 'javascript:' URL in markdown format using Internet Explorer.

Recommendations: For versions prior to 20.0.2, update to version 20.0.2 or later. For versions prior to 19.0.5, update to version 19.0.5 or later. For versions prior to 18.0.11, update to version 18.0.11 or later.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

ALT-PU-2021-3108

ALT-PU-2021-3224

CVE-2020-8294

OPENSUSE-SU-2021:0262-1

OPENSUSE-SU-2021:0274-1

OPENSUSE-SU-2021:1068-1

OPENSUSE-SU-2021_0262-1

OPENSUSE-SU-2021_1068-1

Affected Products

Alt Linux

Internet Explorer

Nextcloud Server

Suse

References · 36

• https://nextcloud.com/security/advisory/?id=NC-SA-2021-002 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-8294 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:1068-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-8294 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2021:0274-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:0262-1 · Vendor Advisory
• https://bugzilla.suse.com/1188256 · Note
• https://suse.com/security/cve/CVE-2021-32726 · Note
• https://suse.com/security/cve/CVE-2020-8294 · Note
• https://bugzilla.suse.com/1181804 · Note
• https://suse.com/security/cve/CVE-2021-32680 · Note
• https://suse.com/security/cve/CVE-2021-32725 · Note
• https://bugzilla.suse.com/1188249 · Note
• https://suse.com/security/cve/CVE-2021-32679 · Note
• https://suse.com/security/cve/CVE-2021-32703 · Note