CVE-2026-51565 in Milk
Summary
by MITRE • 07/28/2026
Cross-site scripting (XSS) vulnerability in Modules/Docs/DocsController.php in Milk admin <=0.9.8 allows remote attackers to inject arbitrary web script or HTML via the action parameter in a crafted request
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Analysis
by VulDB Data Team • 07/28/2026
This cross-site scripting vulnerability exists within the Milk admin content management system version 0.9.8 and earlier, specifically in the DocsController.php file located in the Modules/Docs directory. The flaw manifests when the application fails to properly sanitize user input passed through the action parameter in HTTP requests, creating an opportunity for remote attackers to execute malicious scripts within the context of other users' browsers. The vulnerability represents a classic stored or reflected XSS vector that can be exploited by crafting specially malformed requests containing malicious JavaScript code or HTML content.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding practices within the controller's handling of the action parameter. When user-supplied data flows directly into the application's response without proper sanitization or context-appropriate encoding, attackers can inject malicious payloads that persist in the application's interface or are executed immediately upon page rendering. This flaw falls under CWE-79 which specifically addresses Cross-Site Scripting vulnerabilities in web applications. The vulnerability allows for arbitrary code execution within the victim's browser context, potentially enabling session hijacking, credential theft, or redirection to malicious sites.
The operational impact of this vulnerability extends beyond simple script injection attacks as it provides attackers with persistent access to user sessions and potentially administrative privileges if exploited against privileged accounts. An attacker could craft payloads that steal cookies, modify page content, redirect users to phishing sites, or perform actions on behalf of authenticated users. The reflected nature of the vulnerability means that attacks can be delivered through various vectors including email links, malicious websites, or social engineering campaigns targeting specific users. This vulnerability aligns with ATT&CK technique T1566 which describes social engineering tactics used to gain initial access to systems.
Mitigation strategies should focus on implementing robust input validation and output encoding mechanisms throughout the application stack. The primary defense involves sanitizing all user-provided input, particularly parameters like action, before processing or rendering them in web responses. This includes implementing proper HTML escaping techniques and employing Content Security Policy headers to limit script execution capabilities. Organizations should also consider implementing a Web Application Firewall to detect and block malicious payloads attempting to exploit this vulnerability. Regular security audits and code reviews focusing on input/output handling practices can help identify similar issues in other parts of the application, while maintaining up-to-date software versions ensures protection against known vulnerabilities. The fix should involve proper parameter validation that rejects or sanitizes potentially malicious content before it reaches any output rendering components.