ICS-Advisories

Risk Evaluation

Schneider Electric is aware of a vulnerability in its Modicon Controllers M241 / M251, M258, and LMC058 products. The [Modicon Controllers M241 / M251 / M258](https://www.se.com/ww/en/product-category/3900-plc-pac-and-dedicated-controllers/) and [Modicon LMC058](https://www.se.com/ww/en/product-range/7744-modicon-lmc058/) are Programmable Logic Controllers for performance-demanding applications. Failure to apply the remediation or mitigations provided below may risk a Cross-site Scripting or an open redirect attack which could result in an account takeover scenario or the execution of code in the user browser.

Zusammenfassung der Gegenmaßnahmen

Modicon Controller M241 Firmware version 5.4.13.12 delivered with EcoStruxure™ Machine Expert v2.5.0.1 includes a fix for this vulnerability and can be installed through Schneider Electric Software Installer available here: https://www.se.com/ww/en/download/document/ESEMACS10_INSTALLER/ On the engineering workstation install v2.5.0.1 of EcoStruxure™ Machine Expert. For help refer to Schneider Electric Software Installer User Guide available here: https://www.se.com/ww/en/download/document/EIO0000005500/ Update Modicon Controller M241 to the latest Firmware and perform reboot. For instructions refer to Modicon M241 Logic Controller, Programming Guide: https://www.se.com/ww/en/download/document/EIO0000003059/