CVE-2017-12680 in ShoutBOX
Summary
by MITRE
Cross-Site Scripting (XSS) exists in NexusPHP 1.5 via the type parameter to shoutbox.php.
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Analysis
by VulDB Data Team • 01/09/2021
The vulnerability identified as CVE-2017-12680 represents a classic cross-site scripting flaw within the NexusPHP 1.5 content management system, specifically manifesting in the shoutbox.php script. This type of vulnerability falls under the category of CWE-79 which defines improper neutralization of input during web page generation, commonly known as cross-site scripting. The vulnerability stems from insufficient validation and sanitization of user-supplied input parameters, creating an exploitable vector that allows malicious actors to inject arbitrary JavaScript code into web pages viewed by other users.
The technical execution of this XSS vulnerability occurs through the manipulation of the type parameter within the shoutbox.php endpoint. When users interact with the shoutbox functionality, the application fails to properly sanitize or encode the type parameter before incorporating it into the dynamic web page output. This oversight enables attackers to craft malicious payloads that execute within the context of other users' browsers, potentially leading to session hijacking, credential theft, or redirection to malicious sites. The vulnerability is particularly concerning because it affects a core functionality component of the CMS, making it accessible to attackers with minimal privileges.
The operational impact of this vulnerability extends beyond simple script execution, as it creates persistent security risks for organizations utilizing NexusPHP 1.5. Attackers can leverage this vulnerability to establish persistent footholds within the application environment, potentially gaining access to sensitive user data, modifying content, or conducting further reconnaissance. The vulnerability's presence in a widely used CMS platform means that organizations may face widespread exposure, especially if multiple users interact with the shoutbox feature. This type of vulnerability also aligns with ATT&CK technique T1566 which describes social engineering tactics involving the delivery of malicious payloads through web-based interfaces.
Mitigation strategies for CVE-2017-12680 should prioritize immediate implementation of input validation and output encoding measures. Organizations must ensure that all user-supplied parameters, particularly those used in dynamic content generation, undergo strict sanitization processes before being rendered in web pages. The recommended approach includes implementing proper parameter validation, employing context-specific output encoding, and utilizing secure coding practices that prevent the direct inclusion of user input into executable code contexts. Additionally, organizations should consider implementing web application firewalls, content security policies, and regular security audits to detect and prevent similar vulnerabilities. The vulnerability also underscores the importance of keeping CMS platforms updated, as this specific issue was resolved in subsequent versions of NexusPHP through proper input sanitization mechanisms.