CVE-2009-2401 in PHPEcho CMS
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in PHPEcho CMS 2.0-rc3 allows remote attackers to inject arbitrary web script or HTML via a forum post.
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Analysis
by VulDB Data Team • 12/01/2024
The CVE-2009-2401 vulnerability represents a critical cross-site scripting flaw discovered in PHPEcho CMS version 2.0-rc3, a content management system widely used for web publishing and forum management. This vulnerability resides within the forum posting functionality, creating a dangerous pathway for malicious actors to execute arbitrary web scripts or HTML code within the context of authenticated user sessions. The flaw fundamentally compromises the integrity of user interactions and can potentially lead to session hijacking, data theft, or further exploitation of the affected web application.
The technical implementation of this XSS vulnerability stems from inadequate input validation and output sanitization within the forum posting component of PHPEcho CMS. When users submit posts containing malicious scripts, the application fails to properly escape or filter special characters that could be interpreted as HTML or JavaScript commands. This allows attackers to inject payloads that execute in the browsers of other users who view the compromised forum posts. The vulnerability operates as a reflected XSS vector, where the malicious payload is immediately reflected back to users without any server-side storage or processing, making it particularly dangerous for real-time forum environments.
The operational impact of CVE-2009-2401 extends beyond simple script injection, creating significant security risks for organizations relying on PHPEcho CMS for collaborative content management. Attackers can leverage this vulnerability to steal session cookies, redirect users to malicious websites, deface forum content, or even execute more sophisticated attacks such as credential theft or privilege escalation within the CMS. The vulnerability affects all users who can submit forum posts, potentially compromising both regular users and administrators who may inadvertently view malicious content. This creates a chain reaction where a single compromised post can affect an entire community of users, making the impact particularly severe for public forums or community-driven websites.
Security professionals should approach mitigation of this vulnerability through multiple layers of defense, beginning with immediate patching of the affected PHPEcho CMS version to the latest stable release. The remediation process should include implementing proper input validation mechanisms that sanitize all user-submitted content before rendering it in the browser, utilizing output encoding techniques to prevent script execution, and deploying web application firewalls that can detect and block suspicious script patterns. Organizations should also consider implementing content security policies to restrict script execution and establish proper access controls to limit who can post content. This vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws in web applications, and represents a classic example of how inadequate data sanitization can create persistent security weaknesses that require comprehensive defensive measures. The ATT&CK framework categorizes this vulnerability under the T1059.008 technique for "Command and Scripting Interpreter: PowerShell" as it enables attackers to execute malicious scripts within user browsers, making it a critical component in the exploitation chain for broader attacks against web applications.