Risk Letters

Exploited vulnerability

CVE-2021-26829

TLP:CLEAR

OpenPLC ScadaBR Cross-site Scripting Vulnerability

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

Facts

  • Vendor: OpenPLC
  • Product: ScadaBR
  • CVSS: 5.4
  • EPSS (probability of exploitation within 30 days): 48.1 %
  • On CISA's Known Exploited Vulnerabilities list since: 28 November 2025
  • First known exploitation: 28 November 2025
  • CISA's deadline for US federal agencies: 19 December 2025
  • Weakness: CWE-79
  • First seen by Risk Letters: 28 November 2025

Members see which Nordic sectors the flaw hits, and what to do about it.

Get the full brief

Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD