OpenPLC · ScadaBR

CVE-2021-26828

OpenPLC ScadaBR Unrestricted Upload of File with Dangerous Type Vulnerability

Exploited in attacks High 8.8 Attack chance: 39%

What it is

OpenPLC ScadaBR through 0.9.1 on Linux and through 1.12.4 on Windows allows remote authenticated users to upload and execute arbitrary JSP files via view_edit.shtm.

CISA: OpenPLC ScadaBR contains an unrestricted upload of file with dangerous type vulnerability that allows remote authenticated users to upload and execute arbitrary JSP files via view_edit.shtm.

What to do

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

Deadline for US federal agencies: December 24, 2025

Added to the CISA list: December 3, 2025
Published: June 11, 2021
Severity: High 8.8 CVSS 3.1
Chance of attacks in the next 30 days (EPSS): 39% in the top 1.4% of all known vulnerabilities
Weakness: CWE-434
More details: NVD · CVE.org · CISA

All references (3)

More exploited flaws from OpenPLC

Added	Vulnerability	Product	Severity	Attack chance
Nov 28, 2025	Cross-site ScriptingCVE-2021-26829	ScadaBR	Medium 5.4	48%

All of them →

Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.