CVE-2010-1275 in BBSXP
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in ShowPost.asp in BBSXP 2008 allows remote attackers to inject arbitrary web script or HTML via the ThreadID parameter.
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Analysis
by VulDB Data Team • 01/29/2019
The vulnerability identified as CVE-2010-1275 represents a critical cross-site scripting flaw in BBSXP 2008's ShowPost.asp component that exposes web applications to malicious script injection attacks. This vulnerability specifically targets the ThreadID parameter within the ShowPost.asp script, which processes forum thread display functionality. The flaw enables remote attackers to execute arbitrary web scripts or HTML code within the context of other users' browsers, creating a significant security risk for forum communities that rely on this software platform. The vulnerability exists due to insufficient input validation and output encoding mechanisms within the application's parameter handling process, allowing malicious payloads to bypass security controls and execute in user browsers.
The technical implementation of this XSS vulnerability stems from the application's failure to properly sanitize user-supplied input from the ThreadID parameter before rendering it in the web page output. When the ShowPost.asp script processes forum thread identifiers, it directly incorporates user-provided data into HTML responses without adequate encoding or validation. This creates an environment where attackers can embed malicious JavaScript code within the ThreadID parameter, which then executes when other users view the affected forum thread. The vulnerability is classified as reflected XSS since the malicious script is injected into the page response based on user input, making it particularly dangerous for community forums where users frequently interact with thread identifiers.
The operational impact of this vulnerability extends beyond simple script execution, as it enables attackers to perform various malicious activities including session hijacking, credential theft, and data exfiltration from authenticated users. Attackers can craft malicious ThreadID values that redirect users to phishing sites, steal cookies, or inject malware delivery scripts that compromise user systems. The vulnerability affects the integrity of the forum's user experience and can be leveraged to spread malicious content across the entire community, potentially leading to widespread compromise of user accounts and sensitive information disclosure. Organizations using BBSXP 2008 are particularly vulnerable since this represents a core functionality flaw in their web application architecture that undermines basic security assumptions.
Security mitigations for this vulnerability should focus on implementing proper input validation and output encoding mechanisms to prevent malicious script injection. The most effective approach involves sanitizing all user-supplied input through strict parameter validation and applying HTML encoding to all output rendered from user data. Organizations should implement Content Security Policy headers to limit script execution contexts and employ web application firewalls to detect and block malicious payloads. This vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws, and follows ATT&CK technique T1566 for initial access through malicious web content. Regular security assessments and input validation testing should be conducted to prevent similar vulnerabilities in web applications, particularly those handling user-generated content in forum and bulletin board systems. The remediation process requires immediate patching of the ShowPost.asp script and implementation of comprehensive input sanitization controls across all user-facing parameters.