CVE-2021-21803
published 2021-07-16CVE-2021-21803: This vulnerability is present in device_graph_page.php script, which is a part of the Advantech R-SeeNet web applications. A specially crafted URL by an…
PriorityP346medium6.1CVSS 3.1
AVNACLPRNUIRSCCLILAN
EXPLOIT
EPSS
7.90%
94.0th percentile
This vulnerability is present in device_graph_page.php script, which is a part of the Advantech R-SeeNet web applications. A specially crafted URL by an attacker and visited by a victim can lead to arbitrary JavaScript code execution.
Affected
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| advantech | r-seenet | — | — |
Detection & IOCsextracted from sources · hover to see the quote
url{{BaseURL}}/php/device_graph_page.php?is2sim=%22zlo%20onerror=alert(1)%20%22
othershodan: http.html:"r-seenet"
otherfofa: body="r-seenet"
- →XSS payload injected via the 'is2sim' GET parameter in device_graph_page.php; look for reflected payload string in HTTP response body alongside 'Device Status Graph'.
- →Vulnerable parameter is 'is2sim' in the device_graph_page.php script of Advantech R-SeeNet.
- →HTTP GET request to /php/device_graph_page.php with a crafted is2sim value returning HTTP 200 with Content-Type text/html and the reflected payload is a strong indicator of exploitation.
- ·Vulnerability affects Advantech R-SeeNet version 2.4.12 specifically; verify CPE before applying detections.
- ·Exploitation requires user interaction (victim must visit a crafted URL); CVSS UI:R — passive network monitoring alone is insufficient for detection. ↗
CVSS provenance
nvdv3.16.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
nvdv3.09.6CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
nvdv2.04.3MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:N
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Nuclei
Advantech R-SeeNet - Cross-Site Scripting
nuclei·CVSS 6.1
CVE-2021-21803 [MEDIUM] Advantech R-SeeNet - Cross-Site Scripting
Advantech R-SeeNet - Cross-Site Scripting
Advantech R-SeeNet is vulnerable to cross-site scripting via the device_graph_page.php script via the is2sim parameter. A specially crafted URL by an attacker and visited by a victim can lead to arbitrary JavaScript code execution.
Template:
id: CVE-2021-21803
info:
name: Advantech R-SeeNet - Cross-Site Scripting
author: gy741
severity: medium
description: Advantech R-SeeNet is vulnerable to cross-site scripting via the device_graph_page.php script via the is2sim parameter. A specially crafted URL by an attacker and visited by a victim can lead to arbitrary JavaScript code execution.
impact: |
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary script code in the context of a victim's browser, potentially
Talos
Vulnerability Spotlight: Multiple vulnerabilities in Advantech R-SeeNet
blogs_talos·2021-07-15·CVSS 6.1
[MEDIUM] Vulnerability Spotlight: Multiple vulnerabilities in Advantech R-SeeNet
The Talos vulnerability research team discovered these vulnerabilities. Blog by Jon Munshaw.
Cisco Talos recently discovered multiple vulnerabilities in the Advantech R-SeeNet monitoring software.
R-SeeNet is the software system used for monitoring Advantech routers. It continuously collects information from individual routers in the network and records the data into a SQL database. The vulnerabilities Talos discovered exist in various scripts inside of R-SeeNet's web applications.
TALOS-2021-1270 (CVE-2021-21799), TALOS-2021-1271 (CVE-2021-21800) and TALOS-2021-1272 (CVE-2021-21801 - CVE-2021-21803) are all vulnerabilities that could allow an attacker to execute arbitrary JavaScript code in the context of the targeted user's browser. An adversary could exploit any of these vulnerabilit
Talos
Vulnerability Spotlight: Multiple vulnerabilities in Advantech R-SeeNet
blogs_talos·2021-07-15·CVSS 6.1
[MEDIUM] Vulnerability Spotlight: Multiple vulnerabilities in Advantech R-SeeNet
## Vulnerability Spotlight: Multiple vulnerabilities in Advantech R-SeeNet
The Talos vulnerability research team discovered these vulnerabilities. Blog by Jon Munshaw.
Cisco Talos recently discovered multiple vulnerabilities in the Advantech R-SeeNet monitoring software.
R-SeeNet is the software system used for monitoring Advantech routers. It continuously collects information from individual routers in the network and records the data into a SQL database. The vulnerabilities Talos discovered exist in various scripts inside of R-SeeNet's web applications.
TALOS-2021-1270 (CVE-2021-21799), TALOS-2021-1271 (CVE-2021-21800) and TALOS-2021-1272 (CVE-2021-21801 - CVE-2021-21803) are all vulnerabilities that could allow an attacker to execute arbitrary JavaScript code in the context of the t
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NoiseLetter October 2025
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2021-07-16
Published