CVE-2015-5076 in X2CRM
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in X2Engine X2CRM before 5.0.9 allow remote attackers to inject arbitrary web script or HTML via the (1) version parameter in protected/views/admin/formEditor.php; the (2) importId parameter in protected/views/admin/rollbackImport.php; the (3) bc, (4) fg, (5) bgc, or (6) font parameter in protected/views/site/listener.php; the (7) Services[*] parameter in protected/components/views/webForm.php; the (8) file parameter in protected/components/TranslationManager.php; the (9) x2_key parameter in protected/tests/webscripts/x2WebTrackingTestPages/customWebLeadCaptureScriptTest.php; the (10) id parameter in protected/modules/contacts/controllers/ContactsController.php; or the (11) lastEventId parameter to index.php/profile/getEvents.
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Analysis
by VulDB Data Team • 06/19/2022
The CVE-2015-5076 vulnerability represents a critical cross-site scripting flaw affecting X2Engine X2CRM versions prior to 5.0.9, exposing multiple attack vectors that collectively create a significant security risk for web applications. This vulnerability classifies under CWE-79 as a failure to sanitize input, specifically manifesting as multiple XSS vulnerabilities across various components of the CRM system. The attack surface encompasses eleven distinct parameters that accept user input without proper sanitization or validation, making the system susceptible to persistent and reflective cross-site scripting attacks that can compromise user sessions and execute malicious code within the context of the victim's browser.
The technical exploitation of this vulnerability occurs through multiple entry points within the application's codebase, each representing a distinct parameter that fails to properly validate or escape user-supplied data. The version parameter in formEditor.php allows attackers to inject malicious scripts during form editing operations, while the importId parameter in rollbackImport.php presents a similar risk during import rollback processes. The listener.php file contains four additional parameters including bc, fg, bgc, and font that control visual elements of the application interface, making them particularly dangerous as they can manipulate the application's presentation layer to execute malicious scripts. The webForm.php component exposes the Services[*] parameter, which can be exploited during web form processing, while TranslationManager.php's file parameter creates another avenue for script injection during localization processes.
The impact of these vulnerabilities extends beyond simple script execution, as they enable attackers to perform session hijacking, steal sensitive user data, and potentially escalate privileges within the application. The x2_key parameter in the web tracking test pages represents a particularly concerning vector as it could be exploited to manipulate tracking scripts that are often used for analytics and user behavior monitoring. The id parameter in ContactsController.php and lastEventId parameter in profile/getEvents endpoint create persistent XSS risks that can affect user profiles and event tracking systems, allowing attackers to maintain long-term access to compromised user accounts and extract valuable contact information.
Organizations utilizing X2Engine X2CRM versions before 5.0.9 face significant operational risks including potential data breaches, unauthorized access to customer information, and disruption of business operations. The vulnerability aligns with ATT&CK technique T1566.001 for "Phishing: Spearphishing Attachment" and T1203 for "Exploitation for Client Execution" as attackers can leverage these XSS flaws to deliver malicious payloads to unsuspecting users. The attack vectors span across multiple application modules and components, making this vulnerability particularly dangerous as it allows for comprehensive compromise of the entire CRM system. The exploitation requires minimal technical skill and can be automated through various attack frameworks, making it an attractive target for both sophisticated and less experienced threat actors.
Mitigation strategies should include immediate patching to version 5.0.9 or later, implementing comprehensive input validation and output encoding across all application components, and deploying web application firewalls to detect and block malicious requests. Organizations should also implement Content Security Policy headers to prevent script execution, conduct regular security assessments of web applications, and establish proper input sanitization procedures across all user-facing parameters. The vulnerability demonstrates the critical importance of maintaining up-to-date software versions and implementing robust security controls throughout the entire application lifecycle, as these XSS flaws represent a fundamental failure in input validation that can have cascading effects across multiple system components and user sessions.