CVE-2011-5267 in WikiWig
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in spell-check-savedicts.php in the SpellChecker module in Xinha, as used in WikiWig 5.01 and possibly other products, allow remote attackers to inject arbitrary web script or HTML via the (1) to_p_dict or (2) to_r_list parameter. NOTE: this issue might be related to the htmlarea plugin and CVE-2013-5670.
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Analysis
by VulDB Data Team • 01/26/2025
The vulnerability identified as CVE-2011-5267 represents a critical cross-site scripting flaw within the SpellChecker module of Xinha, a rich text editor component that was widely adopted in web applications including the WikiWig 5.01 platform. This vulnerability specifically targets the spell-check-savedicts.php script which handles dictionary management functionality for spell checking operations. The flaw exists in the manner in which user-supplied input is processed and rendered within the application's response, creating an avenue for malicious actors to execute arbitrary code within the context of a victim's browser session. The vulnerability affects not only WikiWig 5.01 but potentially other applications that utilize the Xinha framework, indicating a widespread impact across multiple software implementations that rely on this particular spell checking module.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding within the spell-check-savedicts.php script. Attackers can exploit this weakness by manipulating the to_p_dict and to_r_list parameters, which are used to manage the dictionary files for spell checking operations. When these parameters contain malicious script code, the application fails to properly sanitize or encode the input before incorporating it into the HTML response sent to the user's browser. This lack of proper input sanitization creates a direct path for attackers to inject HTML content that executes within the victim's browser context, potentially leading to session hijacking, credential theft, or other malicious activities. The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws, and represents a classic example of how insecure input handling can lead to remote code execution capabilities within web applications.
The operational impact of this vulnerability extends beyond simple data theft or defacement, as it provides attackers with the capability to establish persistent malicious presence within affected applications. When exploited successfully, the XSS vulnerability allows attackers to execute scripts that can capture user credentials, modify application behavior, or redirect users to malicious websites. The fact that this vulnerability affects the spell checking module means that legitimate users performing routine spell checking operations could unknowingly trigger the malicious payload, making detection more challenging. Additionally, since the vulnerability affects multiple products that utilize the Xinha framework, the potential attack surface is significantly expanded, potentially compromising numerous web applications across different organizations. The connection to CVE-2013-5670 suggests this may be part of a broader family of vulnerabilities affecting the htmlarea plugin, indicating a systemic weakness in the underlying spell checking implementation that requires comprehensive remediation.
Mitigation strategies for CVE-2011-5267 should focus on implementing proper input validation and output encoding mechanisms throughout the spell checking module. The most effective approach involves sanitizing all user-supplied input parameters, particularly those used in dictionary management functions, before processing or rendering them within HTML responses. Organizations should implement strict parameter validation that rejects or encodes potentially malicious content, ensuring that special characters commonly used in XSS attacks are properly escaped. Additionally, employing Content Security Policy (CSP) headers can provide an additional layer of protection by restricting the sources from which scripts can be executed within the application context. The remediation process should include updating to patched versions of the Xinha framework or implementing custom input sanitization routines that specifically address the vulnerable to_p_dict and to_r_list parameters. Security teams should also conduct comprehensive code reviews of all spell checking and input handling components to identify and address similar vulnerabilities that may exist in other parts of the application architecture. Regular security testing including automated vulnerability scanning and manual penetration testing should be implemented to ensure that similar XSS vulnerabilities are not present in other components of the web application stack.