Nextcloud.NotificationShow.XSS

Description

This indicates an attack attempt against a Cross-Site Scripting vulnerability in Nextcloud Server.
The vulnerability is due to insufficient sanitizing of user supplied inputs in the application. A remote attacker may be able to exploit this to execute arbitrary script code within the context of the application.

Affected Products

Nextcloud Server prior to 20.0.6

Impact

System Compromise: Remote attackers can execute arbitrary script code in the context of the affected site.

Recommended Actions

Apply the latest update from the vendor.
https://nextcloud.com/security/advisory/?id=NC-SA-2021-005

References