Schneider Electric Modicon Controllers M241, M251, M258, and LMC058
Schneider Electric has disclosed CVE-2025-13902, a cross-site scripting (XSS) vulnerability affecting Modicon Controllers M241, M251, M258, and LMC058 that allows authenticated attackers to execute arbitrary JavaScript in a victim's browser, potentially leading to account takeover. The vulnerability impacts critical infrastructure sectors including manufacturing and energy, with fixes available for M241/M251 (firmware 5.4.13.12) but no patch available for M258 and LMC058 (all versions affected).
Summary
Schneider Electric has disclosed CVE-2025-13902, a cross-site scripting (XSS) vulnerability affecting Modicon Controllers M241, M251, M258, and LMC058 that allows authenticated attackers to execute arbitrary JavaScript in a victim's browser, potentially leading to account takeover. The vulnerability impacts critical infrastructure sectors including manufacturing and energy, with fixes available for M241/M251 (firmware 5.4.13.12) but no patch available for M258 and LMC058 (all versions affected).
Full text
ICS Advisory Schneider Electric Modicon Controllers M241, M251, M258, and LMC058 Release DateMarch 19, 2026 Alert CodeICSA-26-078-02 Related topics: Industrial Control System Vulnerabilities, Industrial Control Systems View CSAF Summary Successful exploitation of this vulnerability 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. The following versions of Schneider Electric Modicon Controllers M241, M251, M258, and LMC058 are affected: Modicon M241 versions prior to 5.4.13.12 Modicon_Controller_M241 Modicon M251 versions prior to 5.4.13.12 Modicon_Controller_M251 Modicon Controllers M258 all firmware versions Modicon_Controllers_M258 Modicon Controllers LMC058 all firmware versions Modicon_Controllers_LMC058 CVSS Vendor Equipment Vulnerabilities v3 5.4 Schneider Electric Schneider Electric Modicon Controllers M241, M251, M258, and LMC058 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Background Critical Infrastructure Sectors: Commercial Facilities, Critical Manufacturing, Energy Countries/Areas Deployed: Worldwide Company Headquarters Location: France Vulnerabilities Expand All + CVE-2025-13902 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability exists that could cause condition where authenticated attackers can have a victim's browser run arbitrary JavaScript when the victim hovers over a maliciously crafted element on a web server containing the injected payload. View CVE Details Affected Products Schneider Electric Modicon Controllers M241, M251, M258, and LMC058 Vendor:Schneider Electric Product Version:Schneider Electric Modicon M241 versions prior to 5.4.13.12: Modicon_Controller_M241, Schneider Electric Modicon M251 versions prior to 5.4.13.12: Modicon_Controller_M251, Schneider Electric Modicon Controllers M258 all firmware versions: Modicon_Controllers_M258, Schneider Electric Modicon Controllers LMC058 all firmware versions: Modicon_Controllers_LMC058 Product Status:known_affected Remediations MitigationSchneider Electric has identified the following specific workarounds and mitigations users can apply to reduce risk: 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/, https://www.se.com/ww/en/download/document/ESEMACS10_INSTALLER.https://www.se.com/ww/en/download/document/ESEMACS10_INSTALLER/ MitigationSchneider Electric has identified the following specific workarounds and mitigations users can apply to reduce risk: 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/, https://www.se.com/ww/en/download/document/ESEMACS10_INSTALLER.https://www.se.com/ww/en/download/document/EIO0000005500/ MitigationSchneider Electric has identified the following specific workarounds and mitigations users can apply to reduce risk: 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/, https://www.se.com/ww/en/download/document/ESEMACS10_INSTALLER.https://www.se.com/ww/en/download/document/EIO0000003059/ MitigationSchneider Electric has identified the following specific workarounds and mitigations users can apply to reduce risk: 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/, https://www.se.com/ww/en/download/document/ESEMACS10_INSTALLER.https://www.se.com/ww/en/download/document/ESEMACS10_INSTALLER MitigationModicon Controller M251 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 M251 to the latest Firmware and perform reboot. For instructions refer to Modicon M251 Logic Controller, Programming Guide: https://www.se.com/us/en/download/document/EIO0000003089/, https://www.se.com/ww/en/download/document/ESEMACS10_INSTALLER.https://www.se.com/ww/en/download/document/ESEMACS10_INSTALLER/ MitigationModicon Controller M251 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 M251 to the latest Firmware and perform reboot. For instructions refer to Modicon M251 Logic Controller, Programming Guide: https://www.se.com/us/en/download/document/EIO0000003089/, https://www.se.com/ww/en/download/document/ESEMACS10_INSTALLER.https://www.se.com/ww/en/download/document/EIO0000005500/ MitigationModicon Controller M251 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/docu
Indicators of Compromise
- cve — CVE-2025-13902
- malware — CWE-79