OpenPLC ScadaBR Cross-site Scripting Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2025-11-28
• EPSS: 48% chance of exploitation in the next 30 days (higher than 99% of CVEs)

[ Description ]Official description

OpenPLC ScadaBR through 0.9.1 on Linux and through 1.12.4 on Windows allows stored XSS via system_settings.shtm.

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

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 19 Dec 2025): Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4Vendor Advisory
• youtu.be/Xh6LPCiLMa8ExploitThird Party Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource
• www.forescout.com/blog/anatomy-of-a-hacktivist-attack-russian-aligned-group-targets-oticsThird Party Advisory