CVE-2026-12619: Microchip GridTime 3000 XSS Vulnerability (v1.0–1.1)

Technical summary

The GridTime 3000 web interface improperly neutralizes user-supplied input during HTML page generation, enabling stored or reflected XSS attacks. An authenticated attacker can inject JavaScript payloads via input fields or parameters that are rendered without adequate encoding or sanitization. The vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation). The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:R/S:C) reflects network accessibility, low attack complexity, required login credentials, necessary user interaction, and cross-boundary impact (application could affect resources outside its security perimeter).

Business impact

Compromise of user accounts and sessions within GridTime 3000 deployments poses operational and data security risks. Attackers leveraging this XSS can harvest authentication tokens, exfiltrate data from dashboards or reports, modify time-tracking or scheduling records, or escalate privileges if the victim holds administrative roles. In industrial or energy contexts where GridTime 3000 may manage critical scheduling, unauthorized modifications could disrupt operations. The requirement for authentication and user interaction limits exposure but does not eliminate risk in environments with shared accounts or social engineering threats.

Affected systems

Microchip GridTime 3000 firmware versions 1.0r0.03 through 1.1r0.0 are affected. Both the firmware and application installations are vulnerable. Organizations should identify all GridTime 3000 deployments in their inventory and determine which are running versions within this range.

Exploitability

Exploitation requires valid authentication credentials and user interaction—specifically, a victim must click a malicious link or visit an attacker-controlled page containing the XSS payload. The network vector and low attack complexity mean remote exploitation is feasible without special tools or network position. The vulnerability is not listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, suggesting no widespread active exploitation has been documented as of the publication date, but this does not guarantee immunity.

Remediation

Microchip should release a patched version of GridTime 3000 that properly encodes or sanitizes all user input before rendering it in HTML contexts. Organizations should prioritize upgrading to a patched release once available. Interim mitigations include restricting GridTime 3000 access to trusted internal networks, implementing web application firewalls (WAF) to detect and block XSS payloads, enforcing strong authentication to limit unauthorized user creation, and educating users to avoid clicking suspicious links related to GridTime 3000.

Patch guidance

Monitor Microchip's security advisories for the availability of a patched GridTime 3000 release. Verify the specific version numbers in any advisory to confirm the patch addresses versions 1.0r0.03 through 1.1r0.0. Test patches in a staging environment before production deployment to ensure compatibility with your GridTime 3000 configuration and any custom integrations. Plan a phased rollout to minimize operational disruption.

Detection guidance

Monitor web server and application logs for encoded or obfuscated JavaScript patterns in HTTP requests (e.g., script tags, event handlers like 'onerror', 'onload'). Deploy network-based or host-based intrusion detection signatures targeting common XSS payloads. Implement browser-based detection of unexpected script execution within GridTime 3000 sessions. Security Information and Event Management (SIEM) systems should flag authentication followed by unusual DOM manipulation or session hijacking indicators. Conduct periodic security testing or source code reviews if you have access to GridTime 3000 configuration or customization.

Why prioritize this

While the CVSS score of 5.4 (MEDIUM) reflects the requirement for authentication and user interaction, the vulnerability warrants prompt attention due to its direct impact on session security and potential for privilege escalation in multi-user deployments. The absence of KEV listing suggests it has not been actively exploited in the wild, providing a window to patch before threats materialize. Prioritize organizations with public-facing or multi-tenant GridTime 3000 instances, or those with high-privilege GridTime 3000 administrative users.

Risk score, explained

The CVSS 3.1 score of 5.4 reflects moderate severity because XSS requires authentication and user interaction to exploit, and the confidentiality and integrity impacts are limited (one user's data or session) rather than system-wide. However, the cross-boundary scope increases the score by indicating potential lateral movement or privilege escalation within the application environment. Organizations should factor in their GridTime 3000 deployment model, user role distribution, and reliance on GridTime 3000 data integrity when determining internal risk priority.

Frequently asked questions