CVE-2012-2588 in MailEnable
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in MailEnable Enterprise 6.5 allow remote attackers to inject arbitrary web script or HTML via the (1) From, (2) To, or (3) Subject header or (4) body in an SMTP e-mail message.
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Analysis
by VulDB Data Team • 09/14/2025
The vulnerability identified as CVE-2012-2588 represents a critical cross-site scripting flaw within MailEnable Enterprise 6.5 email server software, classified under CWE-79 as improper neutralization of input during web output. This vulnerability exists in the email message processing functionality where the application fails to adequately sanitize user-supplied input from email headers and body content before rendering them in web interfaces. The flaw affects the From, To, Subject, and body fields of SMTP email messages, creating multiple attack vectors for malicious actors to exploit.
Attackers can leverage this vulnerability by crafting specially formatted email messages containing malicious script code within the affected headers or body content. When the vulnerable MailEnable web interface processes these messages and displays them to users, the embedded scripts execute in the context of the user's browser session. This allows attackers to perform actions such as stealing session cookies, redirecting users to malicious sites, defacing web interfaces, or executing unauthorized operations within the email system's administrative functions.
The operational impact of CVE-2012-2588 extends beyond simple script injection, as it can lead to complete compromise of user sessions and potential privilege escalation within the email infrastructure. Since MailEnable serves as an enterprise email solution, successful exploitation could result in unauthorized access to sensitive corporate communications, data exfiltration, and establishment of persistent backdoors through the web administration interface. The vulnerability affects the core functionality of email processing and web rendering, making it particularly dangerous for organizations relying on this platform for business-critical communications.
Organizations should immediately implement mitigations including applying the vendor-provided security patches, configuring input validation and output encoding for all email processing components, and implementing web application firewalls to detect and block malicious script payloads. Additionally, security monitoring should be enhanced to detect unusual email processing patterns and unauthorized access attempts. The vulnerability demonstrates the critical importance of proper input sanitization in web applications and aligns with ATT&CK technique T1566 for initial access through malicious email content, highlighting the need for comprehensive email security measures beyond traditional antivirus solutions. Organizations using MailEnable Enterprise 6.5 must also consider implementing network segmentation and access controls to limit the potential damage from successful exploitation attempts.