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Affected devices do not properly validate and sanitize visual properties of calculated signals contained in imported CSV trace files before rendering them on the Trace page.

This could allow an attacker to social engineer an authorized user who holds the function right “Read diagnostics” into importing a specially crafted trace file. Successful exploitation could allow attacker-controlled JavaScript to execute in the user’s browser session and perform PLC operations through the web server within the scope of the user’s authorization.

The vulnerability in Siemens SIMATIC Drive Controller CPU 1504D TF arises from improper neutralization of input during web page generation (CWE-79). Specifically, visual properties of calculated signals in imported CSV trace files are not properly validated or sanitized before rendering on the Trace page. An attacker can exploit this by social engineering an authorized user to import a specially crafted trace file, leading to execution of attacker-controlled JavaScript in the user's browser session. This script can perform programmable logic controller (PLC) operations through the web server with the user's privileges.

Siemens SIMATIC Drive Controller CPU 1504D TF devices are vulnerable to a cross-site scripting (XSS) issue due to improper validation and sanitization of visual properties in imported CSV trace files. An attacker could craft a malicious trace file that, when imported by an authorized user with 'Read

CVE-2026-63351: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Siemens SIMATIC Drive Controller CPU 1504D TF

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