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openplc

Safeguard articles tagged "openplc" — guides, analysis, and best practices for software supply chain and application security.

3 articles

Vulnerability Analysis

CVE-2021-26829: OpenPLC ScadaBR Cross-site Scripting Vulnerability

CVE-2021-26829 affects OpenPLC ScadaBR and is listed in CISA's Known Exploited Vulnerabilities catalog, meaning exploitation has been observed in the wild. Added 2025-11-28.

Sep 17, 20263 min read
Vulnerability Analysis

CVE-2021-26828: OpenPLC ScadaBR Unrestricted Upload of File with Dangerous Type Vulnerability

CVE-2021-26828 affects OpenPLC ScadaBR and is listed in CISA's Known Exploited Vulnerabilities catalog, meaning exploitation has been observed in the wild. Added 2025-12-03.

Sep 17, 20263 min read
Vulnerability Analysis

Two 2021 ScadaBR Bugs Take Four Years to Reach Confirmed Exploitation

An unrestricted JSP upload and a stored XSS bug in OpenPLC's ScadaBR, both disclosed the same day in 2021, were confirmed exploited within a week of each other in late 2025.

Sep 16, 20265 min read

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