CVE-2009-4743 in WebMail Pro
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in history-storage.aspx in AfterLogic WebMail Pro 4.7.10 and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) HistoryStorageObjectName and (2) HistoryKey parameters.
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Analysis
by VulDB Data Team • 05/03/2026
The vulnerability identified as CVE-2009-4743 represents a critical cross-site scripting flaw within the AfterLogic WebMail Pro email client software version 4.7.10 and earlier. This vulnerability resides in the history-storage.aspx component which handles historical data storage functionality within the webmail interface. The flaw manifests when the application fails to properly sanitize user input parameters, specifically the HistoryStorageObjectName and HistoryKey parameters, creating an avenue for malicious actors to execute arbitrary web scripts within the context of authenticated user sessions.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding mechanisms within the web application's processing pipeline. When the HistoryStorageObjectName and HistoryKey parameters are passed to the history-storage.aspx page without proper sanitization, the application directly incorporates these values into dynamically generated web content without appropriate HTML escaping or script context validation. This allows attackers to inject malicious JavaScript code or HTML content that executes in the victim's browser when the affected page is rendered, potentially leading to session hijacking, credential theft, or data exfiltration.
From an operational impact perspective, this vulnerability presents a significant risk to organizations relying on AfterLogic WebMail Pro as their email infrastructure solution. Attackers can exploit this flaw to gain unauthorized access to user mailboxes, manipulate email content, or establish persistent backdoors within the email system. The vulnerability affects authenticated users since the XSS occurs within the webmail interface where legitimate users would have active sessions. This creates a realistic attack vector where an attacker could send malicious links to users, who upon clicking would unknowingly execute the injected scripts in their browser context.
The vulnerability aligns with CWE-79 which specifically addresses Cross-Site Scripting flaws in web applications, and can be mapped to ATT&CK technique T1531 which covers "Account Access Removal" through session manipulation and credential theft. Organizations using affected versions of AfterLogic WebMail Pro face potential data breaches, unauthorized access to sensitive email communications, and possible compromise of the entire email infrastructure. The attack surface is particularly concerning given that email systems typically contain highly sensitive information including personal data, business communications, and potentially confidential organizational details.
Mitigation strategies should include immediate patching of the AfterLogic WebMail Pro software to version 4.7.11 or later, which contains the necessary input validation fixes. Organizations should also implement additional security measures such as input validation at the application level, proper HTML escaping of all user-supplied content, and regular security assessments of web applications. Network-level protections including web application firewalls and content filtering systems can provide additional defense in depth. Regular security training for users to recognize suspicious email content and links remains essential, as social engineering remains a critical component of successful exploitation attempts. The vulnerability demonstrates the importance of maintaining up-to-date software versions and implementing robust input validation practices to prevent such persistent security flaws in web-based applications.