CVE-2006-1326 in IP.Board
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in Invision Power Board 2.0.4 allow remote attackers to inject arbitrary web script or HTML via the (1) result_type, (2) search_in, (3) nav, (4) forums, and (5) s parameters in the Search action to index.php; (6) st parameter to index.php with showtopics set to 1; (7) m, (8) y, and (9) d parameters in a calendar action; (10) t parameter in a Print action; (11) MID parameter in a Mail action; (12) HID parameter in a Help action; (13) active parameter in a search action; (14) sort_order, (15) max_results, or (16) sort_key parameter in a Members action.
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Analysis
by VulDB Data Team • 12/05/2025
The vulnerability identified as CVE-2006-1326 represents a critical cross-site scripting flaw affecting Invision Power Board version 2.0.4, a widely used web forum software platform. This vulnerability stems from inadequate input validation and sanitization within multiple parameters of the application's core functionality, creating numerous entry points for malicious actors to inject arbitrary web scripts or HTML content. The flaw specifically targets the Search action in index.php where multiple parameters including result_type, search_in, nav, forums, and s are susceptible to XSS attacks, allowing attackers to execute malicious code within the context of other users' browsers.
The technical implementation of this vulnerability follows CWE-79 patterns, which classify cross-site scripting as a code injection flaw that occurs when an application includes untrusted data in web pages without proper validation or encoding. The attack vectors span across various application modules including calendar functionality where m, y, and d parameters in calendar actions are vulnerable, along with print actions through the t parameter, mail actions via the MID parameter, help actions through HID parameter, and member search functions using active, sort_order, max_results, and sort_key parameters. These diverse attack surfaces demonstrate the comprehensive nature of the input sanitization failure within the application's codebase.
The operational impact of this vulnerability is severe as it enables remote attackers to execute arbitrary scripts in the browser context of authenticated users, potentially leading to session hijacking, credential theft, or unauthorized actions within the forum environment. Attackers could exploit these vulnerabilities to redirect users to malicious websites, steal session cookies, or modify forum content. The vulnerability affects not just the basic forum functionality but extends to calendar displays, member listings, search results, and various other interactive elements, making it particularly dangerous for community-based platforms where user trust is paramount. This type of vulnerability directly maps to ATT&CK technique T1566.001 which involves the exploitation of web applications through cross-site scripting attacks.
Mitigation strategies for this vulnerability should focus on implementing comprehensive input validation and output encoding across all user-controllable parameters. The recommended approach involves sanitizing all input data through proper HTML entity encoding before rendering any user-supplied content in web pages. Additionally, implementing Content Security Policy headers can provide an additional layer of protection against XSS attacks by restricting the sources from which scripts can be loaded. The application should also enforce proper parameter validation to ensure that only expected data types and values are accepted, while implementing proper session management and authentication mechanisms to prevent unauthorized access. Regular security audits and input validation reviews should be conducted to prevent similar vulnerabilities from emerging in future releases, particularly focusing on the application's handling of parameters in various action handlers.