Johnson Controls OpenBlue Employee

View CSAF Summary Successful exploitation of these vulnerabilities could allow an attacker to upload malicious files, execute stored cross-site scripting attacks, or inject arbitrary HTML content. The following versions of Johnson Controls OpenBlue Employee are affected: OpenBlue Employee (FMS Employee) <=V2025.3.1 (CVE-2026-21662, CVE-2026-34495, CVE-2026-34497) CVSS Vendor Equipment Vulnerabilities v3 2.4 Johnson Controls Inc. Johnson Controls OpenBlue Employee Unrestricted Upload of File with Dangerous Type, Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) Background Critical Infrastructure Sectors: Critical Manufacturing, Commercial Facilities, Government Services and Facilities, Transportation Systems, Energy Countries/Areas Deployed: Worldwide Company Headquarters Location: Ireland Vulnerabilities Expand All + CVE-2026-21662 The application does not adequately restrict the types of files that can be uploaded, allowing an attacker to submit files with dangerous content types. Uploaded files may be stored in predictable locations and could be leveraged for further exploitation against the application or its users. View CVE Details Affected Products Johnson Controls OpenBlue Employee Vendor: Johnson Controls Inc. Product Version: Johnson Controls Inc. OpenBlue Employee (FMS Employee): <=V2025.3.1 Product Status: known_affected Remediations Mitigation Johnson Controls recommends the following defensive measures to help reduce the risk of exploitation: Apply the latest product update for OpenBlue Employee (FMS Employee). Customers running V2025.3.1 [LV1.1] or earlier should apply the latest available update. Mitigation Limit application access to authorized users and enforce strong authentication. Mitigation Enable the "Do Not Show Files" location setting if the feature is not being actively used. Mitigation Employ a Web Application Firewall (WAF) to help detect and block malicious requests. Mitigation Investigate and promptly remove any suspicious files or content discovered within the application. Mitigation Limit internet exposure by restricting access to trusted networks or VPN users where practical. Mitigation Review uploaded content periodically and remove content that is no longer required. Mitigation For more detailed mitigation instructions, please see Johnson Controls Product Security Advisory JCI-PSA-2026-09 at the following location: https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories Relevant CWE: CWE-434 Unrestricted Upload of File with Dangerous Type Metrics CVSS Version Base Score Base Severity Vector String 3.1 2.4 LOW CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N 4.0 4.8 MEDIUM CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N CVE-2026-34495 Stored XSS occurs when the application improperly handles user input and stores malicious JavaScript code within its database. This script is then rendered and executed whenever another user accesses the compromised page. Unlike reflected XSS, persistent XSS is particularly dangerous because the payload remains active until it is manually removed from the system. View CVE Details Affected Products Johnson Controls OpenBlue Employee Vendor: Johnson Controls Inc. Product Version: Johnson Controls Inc. OpenBlue Employee (FMS Employee): <=V2025.3.1 Product Status: known_affected Remediations Mitigation Johnson Controls recommends the following defensive measures to help reduce the risk of exploitation: Apply the latest product update for OpenBlue Employee (FMS Employee). Customers running V2025.3.1 [LV1.1] or earlier should apply the latest available update. Mitigation Limit application access to authorized users and enforce strong authentication. Mitigation Enable the "Do Not Show Files" location setting if the feature is not being actively use