CVE-2007-2718 in CommuniGate Pro
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the WebMail system in Stalker CommuniGate Pro 5.1.8 and earlier, when using Microsoft Internet Explorer, allows remote attackers to inject arbitrary web script or HTML via crafted STYLE tags.
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Analysis
by VulDB Data Team • 07/13/2025
The vulnerability identified as CVE-2007-2718 represents a critical cross-site scripting flaw within the WebMail component of Stalker CommuniGate Pro version 5.1.8 and earlier releases. This weakness specifically targets users utilizing Microsoft Internet Explorer browsers, making it particularly concerning given IE's widespread adoption in enterprise environments during that time period. The vulnerability stems from insufficient input validation and output encoding mechanisms within the webmail system's handling of user-supplied data, creating an avenue for malicious actors to execute arbitrary script code within the context of authenticated user sessions.
The technical exploitation of this vulnerability occurs through the manipulation of STYLE tags within crafted email messages or web interface interactions. When Internet Explorer processes these maliciously constructed style elements, it fails to properly sanitize the input, allowing attackers to inject HTML and JavaScript code that executes in the victim's browser context. This particular implementation flaw falls under the CWE-79 category of Cross-Site Scripting, specifically manifesting as a reflected XSS vulnerability where the malicious payload is embedded in the web application's response. The vulnerability's impact is amplified by the fact that it leverages the trust relationship between the user and the webmail system, potentially enabling attackers to steal session cookies, perform unauthorized actions, or redirect users to malicious sites.
The operational implications of this vulnerability extend beyond simple script injection, as it can be exploited to compromise entire user sessions within the CommuniGate Pro environment. Attackers can craft sophisticated payloads that exploit the browser's handling of STYLE tags to bypass security restrictions and execute malicious code with the privileges of the authenticated user. This creates a significant risk for organizations relying on the system for email communication, as compromised accounts could lead to data exfiltration, unauthorized access to sensitive communications, and potential lateral movement within network infrastructures. The vulnerability's targeting of Internet Explorer users specifically means that organizations with mixed browser environments may experience varying levels of risk exposure depending on their user base composition.
Mitigation strategies for this vulnerability should focus on immediate patch application to the affected CommuniGate Pro versions, as well as implementing comprehensive input validation and output encoding mechanisms within the webmail system. Organizations should consider implementing Content Security Policy headers to limit the execution of inline scripts and employ web application firewalls to detect and block suspicious STYLE tag patterns. The remediation process must also include user education regarding the dangers of opening untrusted emails and the importance of keeping software updated. From a defensive perspective, this vulnerability aligns with ATT&CK technique T1566.001 for initial access through spearphishing attachments and T1059.007 for command and scripting interpreter for execution, highlighting the multi-layered approach required for comprehensive protection. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in other components of the communication infrastructure, particularly focusing on HTML sanitization and browser compatibility issues.