CVE-2008-0872 in SmarterMail Enterprise
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in SmarterTools SmarterMail Enterprise 4.3 allows remote attackers to inject arbitrary web script or HTML via a STYLE attribute of an element in the Subject field of an e-mail message.
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Analysis
by VulDB Data Team • 10/20/2025
The vulnerability identified as CVE-2008-0872 represents a critical cross-site scripting flaw within SmarterTools SmarterMail Enterprise 4.3 email system. This security weakness resides in the email client's handling of HTML content, specifically when processing the Subject field of incoming email messages. The vulnerability occurs when the system fails to properly sanitize or escape HTML attributes, particularly the STYLE attribute, allowing malicious actors to inject arbitrary web scripts or HTML code into email messages.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding mechanisms within the SmarterMail Enterprise application. When users view email messages containing malicious STYLE attributes in the Subject field, the application renders the HTML content without proper sanitization, creating an environment where attacker-controlled scripts can execute within the context of the victim's browser session. This flaw operates at the application layer and specifically targets the email rendering functionality, making it particularly dangerous in enterprise environments where users frequently access email systems with elevated privileges.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable sophisticated attack vectors including session hijacking, credential theft, and data exfiltration. An attacker exploiting this vulnerability can craft malicious email messages that, when viewed by a victim, execute malicious JavaScript code in the victim's browser context. This could potentially lead to unauthorized access to email accounts, modification of email content, or redirection to malicious websites. The vulnerability affects the entire SmarterMail Enterprise 4.3 deployment and can compromise any user who views the maliciously crafted email message, making it a significant risk to enterprise email security.
This vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws in web applications, and represents a classic example of improper input handling in web-based email systems. From an ATT&CK framework perspective, this vulnerability maps to techniques involving initial access through malicious email content and privilege escalation through session manipulation. Organizations should implement immediate mitigations including input sanitization of email content, disabling of potentially dangerous HTML attributes in email rendering, and user education regarding suspicious email content. The vulnerability also highlights the importance of regular security updates and proper HTML sanitization practices, particularly in enterprise email systems where user trust and data integrity are paramount.