CVE

CVE-2021-21799

6.1

CVSScritical

Exploitable remotely over the internet · no authentication required · user interaction needed.

Description

Cross-site scripting vulnerabilities exist in the telnet_form.php script functionality of Advantech R-SeeNet v 2.4.12 (20.10.2020). If a user visits a specially crafted URL, it can lead to arbitrary JavaScript code execution in the context of the targeted user’s browser. An attacker can provide a crafted URL to trigger this vulnerability.

Attack Vector

Network

Privileges Req.

None

User Interaction

Required

advantech

Updated Sep 26, 2026View on NVD →

S4E scanner

mediumProduct Based Web Vulnerabilities~10 seconds

CVE-2021-21799 Scanner

CVE-2021-21799 scanner - Cross-Site Scripting (XSS) vulnerability in Advantech R-SeeNet

Used 2.4k times · 3.3k assets checked · url

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