CVE-2025-27828 in MiContact Center Business
Summary
by MITRE • 06/24/2025
A vulnerability in the legacy chat component of Mitel MiContact Center Business through 10.0.0.4, 10.1.0.0 through 10.1.0.5, and 10.2.0.0 through 10.2.0.4 could allow an unauthenticated attacker to conduct a reflected cross-site scripting (XSS) attack due to insufficient input validation. A successful exploit requires user interaction and could allow an attacker to execute arbitrary scripts with a limited impact on the confidentiality and the integrity.
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Analysis
by VulDB Data Team • 06/24/2025
The vulnerability identified as CVE-2025-27828 affects the legacy chat component of Mitel MiContact Center Business across multiple version ranges including 10.0.0.4, 10.1.0.0 through 10.1.0.5, and 10.2.0.0 through 10.2.0.4. This issue represents a critical security flaw that stems from inadequate input validation mechanisms within the application's legacy chat functionality. The vulnerability manifests as a reflected cross-site scripting attack vector that can be exploited by unauthenticated attackers without requiring any privileged access or authentication credentials to initiate the malicious payload.
The technical implementation of this vulnerability resides in the insufficient sanitization of user-supplied input parameters within the legacy chat component. When users interact with the chat functionality, the application fails to properly validate or escape input data before processing or displaying it within the web interface. This allows an attacker to inject malicious script code into the application's response, which is then executed in the victim's browser when the page is rendered. The reflected nature of this vulnerability means that the malicious payload is reflected back to the user through the application's normal response mechanisms, typically via URL parameters or form submissions.
The operational impact of this vulnerability extends beyond simple script execution as it creates a potential attack surface for more sophisticated exploitation techniques. While the impact is described as limited regarding confidentiality and integrity, the ability to execute arbitrary scripts in user browsers can lead to session hijacking, credential theft, or redirection to malicious sites. The requirement for user interaction means that attackers must lure victims into clicking on malicious links or visiting compromised pages, but once triggered, the script execution can persist for the duration of the browser session. This vulnerability specifically affects the legacy chat component, suggesting that newer versions of the application may have implemented proper input validation or have been migrated to more secure architectures.
Mitigation strategies for CVE-2025-27828 should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application's legacy chat component. Organizations should immediately apply vendor-provided patches or updates that address the specific input validation flaws in the affected versions. The implementation of proper content security policies can help reduce the impact of successful XSS attempts by limiting the execution context of malicious scripts. Additionally, regular security assessments should be conducted to identify similar vulnerabilities in other legacy components of the Mitel MiContact Center Business platform. This vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws, and follows ATT&CK technique T1059.007 for scripting languages and T1566 for social engineering tactics that leverage user interaction for initial compromise. Organizations should also consider implementing web application firewalls and monitoring for suspicious input patterns that could indicate attempted exploitation of this vulnerability.