Vulnerability · CVE-2021-21801
advantech r-seenet Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published Sep 19, 2024 · catalog updated Sep 19, 2024 · advantech r-seenet Improper Neutralization
Patch now
CVE-2021-21801 is in the CISA known-exploited catalog. Confirm advantech r-seenet Improper Neutralization against the vendor advisory and apply that fix. The CVSS score does not change the priority.
Gaps on this record
- The stored product name is a package slug. The name on this page is taken from the title (advantech r-seenet Improper Neutralization).
- No version range is stored. A customer cannot check an installed version against this record.
- Severity
- Unknown—
- Known exploitation
- CISA KEV and VulnCheck KEV
- EPSS
- 63.41%
- Remediation
- Remediation guidance
- Affected products
- vendor advantech r-seenet
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor advantech r-seenetversion unspecified
How to fix CVE-2021-21801
Recommended remediation
Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
CVE-2021-21801 is in the CISA known-exploited catalog. Confirm advantech r-seenet Improper Neutralization against the vendor advisory and apply that fix. The CVSS score does not change the priority.
Which versions are affected?
Affected version ranges are not on this record. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
What should an analyst verify?
No weakness class is stored. EPSS 63.41%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Sep 19, 2024 · VulnCheck KEV
Detected
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.
Sep 19, 2024 · CISA KEV
Known exploited
Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Sources
- CVE.orgVulnerability recordCVE-2021-21801
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2021-21801
30-day exploitation probability 63.4%
first.org - VulnCheck KEVConfirmed exploitationCVE-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.
vulncheck.com
References
Freshness
Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.