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TI-2021-05569 Aliases CVE-2021-22676GHSA-xwfh-4h89-6h98

Cross-site scripting in WebAccess/SCADA

Priority LOW 28CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

UserExcelOut.asp within WebAccess/SCADA is vulnerable to cross-site scripting (XSS), which could allow an attacker to send malicious JavaScript code. This could result in hijacking of cookie/session tokens, redirection to a malicious webpage, and unintended browser action on the WebAccess/SCADA (WebAccess/SCADA versions prior to 8.4.5, WebAccess/SCADA versions prior to 9.0.1).

Why it matters now

EPSS 0.00642 51st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—WebAccess/SCADAWebAccess/SCADA versions prior to 8.4.5, WebAccess/SCADA versions prior to 9.0.1—No fix listedCNA
  • WebAccess/SCADA Vendor— Affected WebAccess/SCADA versions prior to 8.4.5, WebAccess/SCADA versions prior to 9.0.1 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:advantech:webaccess\/scada:*:*:*:*:*:*:*:*before 8.4.5; 9.0 to before 9.0.1VulnerableAdvantech
  • cpe:2.3:a:advantech:webaccess\/scada:*:*:*:*:*:*:*:* Versions before 8.4.5; 9.0 to before 9.0.1 Vulnerable ·Advantech

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-22676
  2. 2026-10-03 Alias added: GHSA-xwfh-4h89-6h98
  3. 2026-10-21 EPSS moved to the 50th–90th percentile

References

Advisory 1

  • TI-2023-01357 Memory corruption in Advantech WebAccess/SCADA CVSS 3.1CRITICAL 9.8
  • TI-2019-04573 WebAccess/SCADA, Version 8.3. CVSS 3.0CRITICAL 9.8
  • TI-2021-12552 Stack-based buffer overflow in WebAccess/SCADA CVSS 3.1CRITICAL 9.8
  • TI-2019-04577 WebAccess/SCADA, Version 8.3. CVSS 3.0CRITICAL 9.8
  • TI-2023-15822 Code injection in Advantech WebAccess/SCADA CVSS 3.1CRITICAL 9.8
  • TI-2023-15909 Unrestricted file upload in Advantech WebAccess/SCADA CVSS 3.1CRITICAL 9.8
See all 28 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences