CVE-2010-4837 in Com Jsupport
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the JSupport (com_jsupport) component 1.5.6 for Joomla! allows remote attackers to inject arbitrary web script or HTML via the subject parameter (title field) in a saveTicket action to index2.php. NOTE: some of these details are obtained from third party information.
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Analysis
by VulDB Data Team • 08/13/2025
The CVE-2010-4837 vulnerability represents a classic cross-site scripting flaw within the JSupport component for Joomla! version 1.5.6, specifically targeting the saveTicket functionality. This vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is one of the most prevalent and dangerous web application security flaws. The vulnerability exists in the component's handling of user input within the subject parameter, which corresponds to the title field in ticket submissions. Attackers can exploit this weakness by crafting malicious script code within the title field during ticket creation, thereby enabling persistent XSS attacks against other users who view these tickets.
The technical implementation of this vulnerability occurs when the JSupport component fails to properly sanitize or escape user input before rendering it back to users in the web interface. When a user submits a ticket with a malicious payload in the subject field, the component stores this input without adequate validation or encoding mechanisms. Subsequently, when other users access the ticket display page, the malicious script executes within their browser context, potentially leading to session hijacking, credential theft, or redirection to malicious websites. This type of vulnerability is particularly dangerous because it can be exploited during legitimate user interactions, making detection more challenging.
The operational impact of CVE-2010-4837 extends beyond simple script injection, as it provides attackers with a foothold for more sophisticated attacks within the Joomla application. The vulnerability affects the core functionality of the JSupport component, which is designed to manage user support tickets, making it a critical security concern for organizations relying on this support system. This type of vulnerability directly violates the principle of least privilege and can compromise the integrity of the entire support ticketing system.
Organizations should implement multiple layers of defense to mitigate this vulnerability, beginning with immediate patching of the JSupport component to version 1.5.7 or later, which contains the necessary security fixes. Input validation and output encoding should be implemented at the application level, specifically within the component's handling of the subject parameter. The implementation should follow the OWASP Secure Coding practices, ensuring that all user-supplied data is properly escaped before being rendered in HTML contexts. Additionally, organizations should consider implementing Content Security Policy (CSP) headers to prevent unauthorized script execution, and establish regular security audits of third-party components. This vulnerability aligns with ATT&CK technique T1566.001 for initial access through malicious inputs and T1059.001 for command and scripting interpreter execution, making it a significant concern for enterprise security postures. The remediation process should also include user education regarding the dangers of clicking suspicious links or entering untrusted content in support ticket systems.