What is CVE-2021-21801?

CVE-2021-21801 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-2021-21801?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2021-21801 known to be exploited?

4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Advantech R-seenet

CVE-2021-21801

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.634 (99.1th percentile) — read the EPSS interpretation.

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.

Affected products

Advantech R-seenet — versions 2.4.12
N/a Advantech — versions Advantech R-SeeNet 2.4.12 (20.10.2020)

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

talos-cna@cisco.com (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-21801?: CVE-2021-21801 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-2021-21801?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2021-21801 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.