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

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: yes — in CISA KEV since 2025-12-03
EPSS: 39.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-06-11 · updated 2026-06-17
Weakness: CWE-434

Description

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.

Affected products

ScadaBR: through 0.9.1; through 1.12.4

References

http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4
http://packetstormsecurity.com/files/162564/ScadaBR-1.0-1.1CE-Linux-Shell-Upload.html
https://youtu.be/k1teIStQr1A
http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4
http://packetstormsecurity.com/files/162564/ScadaBR-1.0-1.1CE-Linux-Shell-Upload.html
https://youtu.be/k1teIStQr1A
https://github.com/SCADA-LTS/Scada-LTS/pull/2174
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26828

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