CVE-2021-21799

MEDIUM NUCLEI

Advantech R-SeeNet 2.4.12 - Cross-Site Scripting via telnet_form.php

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2021-21799 has a Nuclei detection template available — see the Nuclei card below for the Shodan/FOFA recon queries.

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.

Nuclei Templates (1)

Advantech R-SeeNet 2.4.12 - Cross-Site Scripting
MEDIUMVERIFIEDby arafatansari
Shodan: http.html:"R-SeeNet" || http.html:"r-seenet"
FOFA: body="r-seenet"

References (1)

Core 1
Core References
Exploit, Third Party Advisory x_refsource_misc
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1270

Scores

CVSS v3 6.1
EPSS 0.1229
EPSS Percentile 95.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Details

CWE
CWE-79
Status published
Products (1)
advantech/r-seenet 2.4.12
Published Jul 16, 2021
Tracked Since Feb 18, 2026