XSS in Advantech R-Seenet

CVE-2021-21799

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.123 (96.1th percentile), scored .

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2021-21799: held from 0.123 to 0.123.

EPSS over last 30 days · oldest: 0.123 · newest: 0.123 · change: 0.000

Affected products

  • Advantech R-Seenet — versions 2.4.12
  • Advantech — versions Advantech R-SeeNet 2.4.12 (20.10.2020)

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2021-21799?
CVE-2021-21799 is a medium-severity vulnerability in Advantech R-Seenet, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-07-16.
How severe is CVE-2021-21799?
Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2021-21799 known to be exploited?
5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.