CVE-2010-4155 in eXV2
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in eXV2 CMS 2.10 allow remote attackers to inject arbitrary web script or HTML via the (1) rssfeedURL parameter to manual/caferss/example.php and the sumb parameter to (2) modules/news/archive.php, (3) modules/news/topics.php, and (4) modules/contact/index.php, different vectors than CVE-2007-1965.
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Analysis
by VulDB Data Team • 02/08/2019
The vulnerability described in CVE-2010-4155 represents a critical cross-site scripting weakness affecting eXV2 CMS version 2.10. This issue 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 manifests through multiple attack vectors that allow remote attackers to inject malicious scripts into web pages viewed by other users, potentially leading to session hijacking, data theft, or unauthorized actions performed on behalf of victims.
The technical flaw occurs within the input validation mechanisms of the content management system where user-supplied parameters are not properly sanitized before being processed and displayed. Specifically, the vulnerability exists in the rssfeedURL parameter of manual/caferss/example.php and the sumb parameter across three different modules: modules/news/archive.php, modules/news/topics.php, and modules/contact/index.php. These parameters receive input from external sources without adequate filtering or encoding, creating opportunities for attackers to embed malicious JavaScript code that executes in the context of other users' browsers.
The operational impact of this vulnerability extends beyond simple script injection, as it provides attackers with multiple entry points to compromise the application's security. The fact that these vulnerabilities exist in different modules demonstrates a systemic issue with input handling throughout the CMS, suggesting that similar flaws may exist in other components. Attackers can leverage these vectors to steal session cookies, redirect users to malicious sites, deface web pages, or even execute more sophisticated attacks such as credential theft through phishing techniques. The presence of multiple vectors also increases the attack surface and makes it more difficult for administrators to fully remediate the issue.
Mitigation strategies for CVE-2010-4155 should focus on implementing comprehensive input validation and output encoding mechanisms across all user-supplied parameters. The primary remediation involves sanitizing all input data before processing, particularly parameters that are directly included in HTML output. This aligns with the ATT&CK technique T1203 - Exploitation for Client Execution, which emphasizes the importance of preventing malicious code execution through proper input validation. Organizations should implement proper HTML escaping for all dynamic content, utilize parameterized queries where applicable, and consider implementing a Content Security Policy to limit the execution of unauthorized scripts. Additionally, regular security audits and input validation testing should be conducted to identify and remediate similar vulnerabilities in other parts of the application. The vulnerability's existence in multiple modules also underscores the importance of maintaining up-to-date software versions and implementing proper security configurations to prevent similar issues from occurring in the future.