CVE-2012-2587 in MailSuite Pro
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in AfterLogic MailSuite Pro 6.3 allow remote attackers to inject arbitrary web script or HTML via an e-mail message body with a crafted SRC attribute of (1) an IFRAME element or (2) a SCRIPT element.
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Analysis
by VulDB Data Team • 09/12/2025
The vulnerability identified as CVE-2012-2587 represents a critical cross-site scripting flaw affecting AfterLogic MailSuite Pro version 6.3. This security weakness stems from inadequate input validation and sanitization mechanisms within the email processing pipeline, specifically when handling email message bodies containing crafted html elements. The vulnerability manifests when the application fails to properly sanitize user-supplied content, creating an avenue for malicious actors to execute arbitrary javascript code within the context of a victim's browser session. This particular flaw exists within the web-based email client interface that processes incoming email messages, making it particularly dangerous as it can be exploited through routine email communication channels.
The technical exploitation of this vulnerability occurs through the manipulation of html elements within email message bodies, specifically targeting the src attribute of iframe and script elements. Attackers can craft malicious email messages containing specially formatted html code that, when rendered by the vulnerable mail client, executes malicious javascript in the victim's browser. The vulnerability is categorized under CWE-79 as a cross-site scripting weakness, which is classified as a critical security flaw in web applications. This type of vulnerability allows attackers to bypass normal access controls and potentially escalate privileges, steal session cookies, or perform actions on behalf of authenticated users. The attack vector is particularly concerning because it leverages the trust relationship between the user and the email application, making it difficult to detect and prevent through traditional network security measures.
The operational impact of CVE-2012-2587 extends beyond simple script injection, potentially enabling sophisticated attacks such as session hijacking, credential theft, or redirection to malicious websites. When a user opens a malicious email message, the embedded javascript code executes automatically within the context of their authenticated session, allowing attackers to access sensitive email content, send emails on behalf of the victim, or even modify account settings. This vulnerability particularly affects organizations relying on AfterLogic MailSuite Pro for email services, as it can compromise the confidentiality and integrity of email communications. The attack can be executed without requiring any special privileges or complex exploitation techniques, making it highly accessible to threat actors across different skill levels.
Mitigation strategies for this vulnerability should focus on implementing comprehensive input sanitization and output encoding mechanisms within the email processing pipeline. Organizations should immediately apply the vendor-provided security patches or upgrade to patched versions of AfterLogic MailSuite Pro to address the root cause of the vulnerability. Additionally, implementing content security policies and using proper html sanitization libraries can help prevent similar issues in the future. Security measures should include regular security assessments of web applications, input validation at multiple layers, and user education regarding the risks of opening suspicious email content. The remediation approach aligns with defensive techniques outlined in the MITRE ATT&CK framework under the initial access and execution phases, where attackers leverage web-based vulnerabilities to establish persistent access to target systems. Organizations should also consider implementing email filtering solutions that can detect and block suspicious html content before it reaches end users.