CVE-2026-19657 in ScadaLTS
Summary
by MITRE • 08/12/2026
ScadaLTS 2.7.8.1 reflects user-supplied input into an HTML response without sanitization. An unauthenticated attacker who lures a victim into visiting a crafted URL can execute arbitrary JavaScript in the context of the victim's browser session.
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Analysis
by VulDB Data Team • 08/13/2026
This vulnerability exists within ScadaLTS version 2.7.8.1, representing a classic cross-site scripting flaw that falls under CWE-79 - Improper Neutralization of Input During Web Page Generation. The system fails to properly sanitize user-supplied input before incorporating it into HTML responses, creating an opening for malicious code execution. An attacker can craft a specially designed URL containing malicious JavaScript payload that gets reflected back to the victim's browser when they visit the page. This reflection occurs without any sanitization or encoding of the input data, allowing the attacker to inject arbitrary script code that executes within the victim's browser context.
The operational impact of this vulnerability is significant as it enables an unauthenticated attacker to leverage social engineering tactics to compromise user sessions. The attacker need only lure a victim into clicking a maliciously crafted URL, which then executes JavaScript code in the victim's browser session with the same privileges and access rights as the legitimate user. This opens the door for session hijacking, credential theft, data exfiltration, and potential lateral movement within the network environment. The vulnerability specifically affects web-based components of the SCADA system where user input is processed and displayed without proper validation or sanitization mechanisms.
From a threat modeling perspective, this vulnerability aligns with ATT&CK technique T1566.001 - Phishing: Spearphishing Attachment, as it relies on users being tricked into visiting malicious URLs. The attack vector operates through web browser exploitation where the reflected payload executes in the victim's session context, potentially allowing attackers to access sensitive operational data or manipulate system controls. The lack of authentication requirements makes this particularly dangerous for industrial control systems where unauthorized access could lead to operational disruptions or safety hazards.
The recommended mitigations include implementing proper input validation and output encoding mechanisms across all web interfaces that process user-supplied data. The system should employ Content Security Policy headers to restrict script execution and sanitize all user inputs before rendering them in HTML contexts. Additionally, regular security updates and patches should be applied to address known vulnerabilities in web frameworks and libraries. Network segmentation and monitoring solutions can help detect anomalous traffic patterns indicative of exploitation attempts. Organizations should also implement user education programs to recognize and avoid suspicious URLs and phishing attempts that could leverage this vulnerability.