CVE-2025-27827 in MiContact Center Business
Summary
by MITRE • 06/24/2025
A vulnerability in the legacy chat component of Mitel MiContact Center Business through 10.2.0.3 could allow an unauthenticated attacker to conduct an information disclosure attack due to improper handling of session data. A successful exploit requires user interaction and could allow an attacker to access sensitive information, leading to unauthorized access to active chat rooms, reading chat data, and sending messages during an active chat session.
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Analysis
by VulDB Data Team • 06/24/2025
The vulnerability identified as CVE-2025-27827 affects the legacy chat component of Mitel MiContact Center Business version 10.2.0.3 and earlier, representing a critical security flaw that undermines the integrity of session management within the application. This issue stems from inadequate handling of session data, creating a pathway for unauthenticated attackers to exploit the system's communication infrastructure. The vulnerability specifically targets the legacy chat functionality that forms part of the broader contact center solution, making it a significant concern for organizations relying on this platform for customer service operations.
The technical implementation of this flaw lies in the improper session data handling mechanisms that govern how chat sessions are managed within the Mitel platform. When users engage with the legacy chat component, the system should maintain secure session tokens and authentication states that prevent unauthorized access to active chat rooms. However, the vulnerability allows attackers to manipulate or intercept session information, enabling them to gain unauthorized access to ongoing conversations and potentially inject malicious content. This improper session management creates a persistent risk where session identifiers may be predictable or easily compromised, allowing attackers to establish unauthorized chat sessions.
From an operational standpoint, the impact of this vulnerability extends beyond simple information disclosure to encompass complete unauthorized access to active communication channels. An attacker who successfully exploits this vulnerability can not only read chat data from active sessions but also send messages as if they were legitimate participants, potentially leading to social engineering attacks or data manipulation. The requirement for user interaction to initiate the exploit suggests that the attack vector may involve phishing or targeted social engineering campaigns where users are tricked into clicking malicious links or visiting compromised web pages that trigger the vulnerability. This attack model aligns with common techniques described in the attack pattern taxonomy under attack techniques such as web application attacks and session hijacking.
The security implications of CVE-2025-27827 are particularly severe given the nature of contact center communications, where sensitive customer data, personal information, and business-critical discussions occur regularly. This vulnerability creates a direct pathway for attackers to access confidential information that may include customer account details, personal identification information, financial data, and proprietary business communications. The ability to send messages during active chat sessions further amplifies the threat, as attackers could potentially manipulate conversations, inject false information, or redirect customers to malicious resources. This vulnerability directly relates to CWE-306, which addresses missing authentication for critical functions, and may also involve elements of CWE-287, concerning improper handling of authentication tokens.
Organizations utilizing Mitel MiContact Center Business should prioritize immediate remediation efforts to address this vulnerability, including applying the latest security patches provided by Mitel and implementing additional network-level controls to monitor for suspicious session activity. The mitigation strategy should encompass both immediate technical fixes and operational procedures to detect and respond to potential exploitation attempts. Network segmentation and access controls should be strengthened to limit the attack surface, while monitoring systems should be configured to detect unusual session behavior or unauthorized access patterns. Security teams should also conduct comprehensive audits of all legacy chat components to identify similar vulnerabilities and implement proper session management protocols that align with industry standards such as those outlined in the OWASP Top Ten and NIST cybersecurity frameworks. The vulnerability demonstrates the importance of maintaining secure session management practices throughout the application lifecycle and highlights the risks associated with legacy system components that may not receive adequate security updates or modernization efforts.