CVE-2024-8528 is a reflected Cross-site Scripting (XSS) vulnerability identified in Automated Logic's WebCTRL product version 6.0 and Carrier i-VU systems. The vulnerability stems from improper neutralization of input during web page generation, specifically a GET parameter that is not sanitized before being reflected in the HTTP response. This flaw allows attackers to craft malicious URLs containing executable JavaScript code, which, when visited by an authenticated user, can execute in the context of the victim's browser session. The vulnerability is classified under CWE-79, indicating improper input validation leading to XSS. The CVSS 4.0 vector indicates that exploitation requires low privileges (PR:L), user interaction (UI:P), and has a local attack vector (AV:L), meaning the attacker must have some level of access to the network or system to deliver the payload. The impact on confidentiality, integrity, and availability is high if exploitation succeeds, as attackers can steal session tokens, perform actions on behalf of users, or manipulate data displayed in the web interface. Although no public exploits are currently known, the presence of this vulnerability in critical building automation systems poses a significant risk. The affected product, WebCTRL, is widely used for building management and control, making it a valuable target for attackers seeking to disrupt operations or gain footholds in enterprise environments. The vulnerability was published on November 19, 2025, and no patches have been linked yet, indicating that organizations should proactively implement compensating controls. The vulnerability's local attack vector and requirement for user interaction limit its ease of exploitation but do not eliminate the risk, especially in environments where users may be tricked into clicking malicious links. The scope is limited to the WebCTRL 6.0 version and Carrier i-VU systems, but given their deployment in critical infrastructure, the threat remains significant.

For European organizations, the impact of CVE-2024-8528 can be substantial, particularly for those relying on Automated Logic WebCTRL and Carrier i-VU for building automation and management. Exploitation could lead to unauthorized access to building control interfaces, allowing attackers to manipulate HVAC, lighting, or security systems, potentially causing operational disruptions or safety hazards. Confidentiality risks include theft of user credentials and session tokens, enabling further lateral movement within the network. Integrity could be compromised by unauthorized changes to system settings or data displayed to users. Availability impacts are less direct but could arise if attackers disrupt control systems or cause malfunctions. Given the critical nature of building management systems in commercial, governmental, and industrial facilities, successful exploitation could have cascading effects on business continuity and occupant safety. The medium CVSS score reflects the need for user interaction and local access, which somewhat limits widespread exploitation but does not eliminate targeted attacks. European organizations must consider these risks in their operational technology (OT) security strategies, especially as these systems often bridge IT and OT environments.

1. Monitor vendor communications closely and apply security patches promptly once available for WebCTRL and Carrier i-VU products. 2. Implement strict input validation and output encoding on all web interface parameters, especially the identified GET parameter, to prevent injection of malicious scripts. 3. Deploy Web Application Firewalls (WAFs) with custom rules to detect and block reflected XSS payloads targeting the affected URLs. 4. Conduct user awareness training to reduce the risk of users clicking on malicious links that could exploit this vulnerability. 5. Restrict access to the WebCTRL and Carrier i-VU web interfaces to trusted networks and authenticated users only, using network segmentation and VPNs where appropriate. 6. Enable multi-factor authentication (MFA) for access to building management systems to reduce the impact of credential theft. 7. Regularly audit and monitor logs for unusual activity or repeated access attempts that could indicate exploitation attempts. 8. Consider implementing Content Security Policy (CSP) headers to limit the execution of unauthorized scripts within the web interface. 9. Collaborate with OT and IT security teams to ensure coordinated response and defense-in-depth strategies around these critical systems.