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Rewterz Threat Advisory – CVE-2021-27436 – ICS: Advantech WebAccess/SCADA cross-site scripting

Severity

Medium

Analysis Summary

CVE-2021-27436

Advantech WebAccess/SCADA is vulnerable to cross-site scripting, caused by improper validation of user-supplied input. A remote attacker could exploit this vulnerability using a specially-crafted URL to execute script in a victim’s Web browser within the security context of the hosting Web site, once the URL is clicked. An attacker could use this vulnerability to steal the victim’s cookie-based authentication credentials.

Impact

Cross-site scripting

Affected Vendors

Advantech

Affected Products

  • Advantech WebAccess/SCADA 8.2_20170817
  • Advantech WebAccess/SCADA 8.3.2
  • Advantech WebAccess/SCADA 8.3
  • Advantech WebAccess/SCADA 8.3.5
  • Advantech WebAccess/SCADA 8.3.4
  • Advantech WebAccess/SCADA 8.4.0
  • Advantech WebAccess/SCADA 8.4.1
  • Advantech WebAccess/SCADA 9.0

Remediation

Upgrade to the latest version of WebAccess/SCADA (9.0.1 or later).

Advantech Web site

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