CVE-2024-2596 in AMSS++
Summary
by MITRE • 03/18/2024
Vulnerability in AMSS++ version 4.31, which does not sufficiently encode user-controlled input, resulting in a Cross-Site Scripting (XSS) vulnerability through /amssplus/modules/mail/main/select_send.php, in multiple parameters. This vulnerability could allow a remote attacker to send a specially crafted URL to an authenticated user and steal their session cookie credentials.
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Analysis
by VulDB Data Team • 04/14/2025
The vulnerability identified as CVE-2024-2596 resides within AMSS++ version 4.31, a software platform that handles email functionalities through its modules. The core issue manifests in the /amssplus/modules/mail/main/select_send.php endpoint where the application fails to properly sanitize or encode user-provided input data. This particular weakness allows attackers to inject malicious scripts into the application's response, creating a cross-site scripting vulnerability that can be exploited remotely. The vulnerability affects multiple parameters within the select_send.php script, indicating a systemic issue with input validation rather than a single point of failure. The specific nature of this flaw enables attackers to craft malicious URLs that, when executed by an authenticated user, can steal session cookies and potentially gain unauthorized access to user accounts. This represents a critical security gap in the application's data handling processes.
The technical exploitation of this vulnerability follows a classic XSS attack pattern where malicious input is not properly escaped or encoded before being rendered in the web application's output. When an authenticated user navigates to a specially crafted URL containing malicious script code, the application processes this input without adequate sanitization, allowing the script to execute within the user's browser context. This execution context provides attackers with the ability to access session cookies, which contain authentication tokens that can be harvested and used to impersonate legitimate users. The vulnerability's impact extends beyond simple script execution as it directly compromises user authentication mechanisms, potentially enabling complete account takeover scenarios. This weakness falls under CWE-79 which specifically addresses cross-site scripting vulnerabilities in software applications, making it a well-documented and widely recognized security concern.
The operational impact of CVE-2024-2596 is significant for organizations utilizing AMSS++ version 4.31, as it creates a persistent threat vector that can be exploited by remote attackers without requiring any privileged access to the system. Authenticated users become the unwitting participants in the attack, making this vulnerability particularly dangerous as it leverages the trust relationship between the application and its users. The session cookie theft capability means that attackers can potentially access sensitive email communications, personal data, and other resources that users can access through their accounts. This vulnerability can be weaponized through various attack vectors including phishing campaigns, social engineering, or direct URL delivery to compromised users. The attack surface is broadened by the fact that multiple parameters are affected, increasing the likelihood of successful exploitation. Organizations may experience unauthorized data access, potential data exfiltration, and compromised user trust. The vulnerability also impacts the application's integrity as it allows attackers to manipulate the user interface and potentially redirect users to malicious sites.
Mitigation strategies for CVE-2024-2596 must focus on implementing proper input validation and output encoding mechanisms throughout the application. The most effective immediate solution involves ensuring that all user-provided input is properly sanitized and encoded before being processed or displayed in the application's response. This includes implementing context-specific encoding for different output contexts such as HTML, JavaScript, and URL parameters. Organizations should prioritize updating to the latest version of AMSS++ where this vulnerability has been patched, as vendors typically address such issues in subsequent releases. Additionally, implementing Content Security Policy (CSP) headers can provide an additional layer of protection against XSS attacks by restricting the sources from which scripts can be loaded. Regular security testing including dynamic application security testing and manual code reviews should be conducted to identify similar vulnerabilities in other parts of the application. Network monitoring and intrusion detection systems should be configured to detect suspicious URL patterns that may indicate attempts to exploit this vulnerability. The implementation of proper session management practices including secure cookie attributes and session timeout mechanisms can also reduce the impact of successful exploitation attempts. Organizations should also consider implementing user education programs to raise awareness about phishing attacks and suspicious URL delivery methods that could be used to exploit this vulnerability.