CVE-2009-4685 in Astrology
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in celebrities.php in PHP Scripts Now Astrology allows remote attackers to inject arbitrary web script or HTML via the day parameter.
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Analysis
by VulDB Data Team • 05/02/2026
The CVE-2009-4685 vulnerability represents a classic cross-site scripting flaw in the astrology module of PHP Scripts Now, specifically within the celebrities.php script. This vulnerability resides in the handling of user input through the day parameter, creating a pathway for remote attackers to execute malicious scripts within the context of other users' browsers. The flaw demonstrates a fundamental failure in input validation and output sanitization mechanisms, allowing attackers to inject arbitrary web script or HTML content that gets executed when other users view the affected page.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious payload containing script code and passes it through the day parameter in the celebrities.php script. When the vulnerable application processes this input without proper sanitization, the malicious code becomes part of the dynamic web page content. Upon rendering, the injected script executes in the victim's browser context, potentially leading to session hijacking, credential theft, or redirection to malicious sites. This type of vulnerability falls under CWE-79, which specifically addresses Cross-Site Scripting, and represents a critical weakness in web application security architecture.
The operational impact of this vulnerability extends beyond simple script injection, as it can enable sophisticated attack chains that compromise user sessions and data integrity. Attackers can leverage this flaw to steal cookies, modify page content, redirect users to phishing sites, or even perform actions on behalf of authenticated users. The vulnerability affects any user who accesses the astrology module through the celebrities.php script, making it particularly dangerous in environments where the application serves a large user base. The persistent nature of the vulnerability means that once exploited, attackers can maintain their access and continue to compromise users over time.
Mitigation strategies for CVE-2009-4685 must address both immediate remediation and long-term architectural improvements. The primary fix involves implementing proper input validation and output encoding for all user-supplied parameters, particularly the day parameter in this case. Developers should employ context-specific escaping mechanisms when rendering user input into HTML contexts, ensuring that any potentially malicious content is neutralized before display. Security measures should include validating input against expected formats, implementing Content Security Policy headers to limit script execution, and conducting thorough input sanitization. Organizations should also consider implementing web application firewalls and regular security testing to detect similar vulnerabilities in other application components. This vulnerability exemplifies the importance of following secure coding practices and adhering to the principle of least privilege in web application development, aligning with ATT&CK technique T1059 for command and script injection.