CVE-2006-6035 in Blog Cms
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in list.php in BLOG:CMS 4.1.3 and earlier allows remote attackers to inject arbitrary web script or HTML via the FADDR parameter.
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Analysis
by VulDB Data Team • 04/28/2026
The vulnerability identified as CVE-2006-6035 represents a classic cross-site scripting flaw within the BLOG:CMS content management system version 4.1.3 and earlier. This security weakness resides in the list.php script which fails to properly sanitize user input before incorporating it into web responses. The specific parameter affected is FADDR which when manipulated by an attacker can be used to inject malicious scripts or HTML code into the application's output. This type of vulnerability falls under the category of CWE-79 - Improper Neutralization of Input During Web Page Generation, which is a fundamental weakness in web application security that has been consistently documented in the CWE database since its inception. The vulnerability demonstrates the critical importance of input validation and output encoding in preventing malicious code injection attacks.
The operational impact of this XSS vulnerability extends beyond simple script execution as it allows attackers to manipulate the behavior of legitimate users who visit affected pages. When a user accesses a page that contains the malicious FADDR parameter, the injected script executes within the user's browser context, potentially leading to session hijacking, credential theft, or redirection to malicious sites. The attack vector is particularly concerning because it requires no authentication from the attacker and can be executed through simple web requests. This vulnerability aligns with ATT&CK technique T1566.001 - Phishing: Spearphishing Attachment, as attackers could craft malicious links containing the XSS payload to be delivered to unsuspecting users. The vulnerability also maps to ATT&CK technique T1059.007 - Command and Scripting Interpreter: JavaScript, as the attack specifically targets JavaScript execution within web browsers.
The exploitation of this vulnerability requires minimal technical skill and can be automated through various attack frameworks. Attackers typically construct malicious URLs with encoded JavaScript payloads in the FADDR parameter, which when executed in a victim's browser can perform actions such as stealing session cookies, redirecting users to phishing sites, or defacing the blog content. The vulnerability's persistence is enhanced by the fact that it affects the core list.php functionality, which is likely to be accessed frequently by both administrators and regular users. Organizations using affected versions of BLOG:CMS face significant risk of user data compromise, as the injected scripts can access the victim's session information and potentially escalate to full account compromise. The vulnerability also demonstrates poor security practices in input handling, as proper sanitization or encoding of user-supplied parameters should have prevented the malicious code from being executed in the first place.
Mitigation strategies for CVE-2006-6035 should include immediate patching of the BLOG:CMS application to version 4.1.4 or later where the vulnerability has been addressed. Organizations should implement comprehensive input validation and output encoding mechanisms to prevent similar vulnerabilities from occurring in other components. Web application firewalls can provide additional protection by detecting and blocking suspicious parameter values, though this should not replace proper code-level fixes. Security teams should also conduct regular vulnerability assessments and implement security awareness training for developers to prevent similar input validation flaws in future applications. The fix for this vulnerability typically involves proper HTML encoding of user-supplied input before it is rendered in web pages, ensuring that special characters are properly escaped to prevent script execution. Additionally, implementing content security policies can provide defense-in-depth measures to limit the execution of unauthorized scripts even if other security controls fail.