CVE-2012-6622 in ForumPress
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in fs-admin/fs-admin.php in the ForumPress WP Forum Server plugin before 1.7.4 for WordPress allow remote attackers to inject arbitrary web script or HTML via the (1) groupid parameter in an editgroup action or (2) usergroup_id parameter in an edit_usergroup action.
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Analysis
by VulDB Data Team • 06/23/2025
The CVE-2012-6622 vulnerability represents a critical cross-site scripting flaw discovered in the ForumPress WP Forum Server plugin for WordPress, affecting versions prior to 1.7.4. This vulnerability resides within the fs-admin/fs-admin.php file and demonstrates a classic input validation weakness that enables remote attackers to execute malicious scripts in the context of victim browsers. The flaw specifically manifests when the plugin processes administrative actions related to group management, creating a pathway for attackers to inject arbitrary web script or HTML code into the application's administrative interface.
The technical implementation of this vulnerability stems from insufficient sanitization of user-supplied input parameters within the plugin's administrative functionality. Attackers can exploit this weakness by manipulating two distinct parameters: groupid in the editgroup action and usergroup_id in the edit_usergroup action. These parameters are directly incorporated into the plugin's response without adequate validation or encoding, allowing malicious payloads to be executed when administrators view the affected pages. The vulnerability falls under CWE-79 - Improper Neutralization of Input During Web Page Generation, which is a fundamental weakness in web application security that enables XSS attacks.
The operational impact of this vulnerability extends beyond simple script injection, as it provides attackers with the capability to compromise administrator sessions and potentially gain complete control over the WordPress installation. When administrators access pages containing the malicious input, their browsers execute the injected scripts, which can lead to session hijacking, data exfiltration, or further exploitation of the compromised system. The attack vector is particularly dangerous because it targets the administrative interface, meaning successful exploitation could result in unauthorized modifications to forum settings, user management, or even complete removal of the plugin. This vulnerability aligns with ATT&CK technique T1566.001 - Phishing: Spearphishing Attachment, as attackers can craft malicious payloads that appear legitimate within the forum administration context.
Mitigation strategies for CVE-2012-6622 primarily focus on immediate patching of the affected plugin to version 1.7.4 or later, which implements proper input validation and output encoding. Organizations should also implement additional defensive measures including input sanitization at multiple layers, regular security audits of installed plugins, and monitoring of administrative interfaces for suspicious activity. Network-level protections such as web application firewalls can provide additional defense-in-depth, though they should not replace proper patch management. The vulnerability demonstrates the critical importance of keeping WordPress plugins updated and following secure coding practices that prevent user input from being directly rendered without proper sanitization. Administrators should also consider implementing role-based access controls and monitoring administrative actions to detect potential exploitation attempts. This vulnerability serves as a reminder of how seemingly minor input validation flaws in administrative interfaces can create significant security risks when exploited by attackers with knowledge of the target system's configuration and user behavior patterns.