OpenPLC ScadaBR Cross-site Scripting Vulnerability

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• NewsExploited · CISA KEVOpenPLC · ScadaBR

  OpenPLC ScadaBR Cross-site Scripting Vulnerability

  CVE-2021-26829

  OpenPLC ScadaBR contains a cross-site scripting vulnerability via system_settings.shtm.

  CISA's required action · due 19 Dec 2025 for U.S. federal civilian agencies

  Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  Cited by CISA: github.com · nvd.nist.gov

  Added to KEV 28 Nov 2025 · Source checked 4 Nov 2026, 16:40 UTC · CISA KEV entry

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