Eyoucms is a content management system used by developers and website administrators for creating and managing web content. It is popular among small to medium-sized businesses for its ease of use and flexibility. Eyoucms allows users to design, develop, and deploy websites with minimal technical expertise. It is commonly used for building blogs, e-commerce sites, and corporate websites. The system provides various plugins and themes to extend its functionality.
The vulnerability detected in eyoucms v.1.6.5 is a Cross-Site Scripting (XSS) flaw. This allows attackers to execute arbitrary scripts in the context of the user's browser. The malicious script can hijack user sessions, deface websites, or redirect users to malicious sites. It poses a significant security risk by enabling attackers to manipulate web content and perform phishing attacks.
The XSS vulnerability is found in the "func" parameter of the eyoucms application. An attacker can craft a malicious URL that, when accessed, executes arbitrary scripts in the victim's browser. The vulnerability resides in the improper sanitization of user input, allowing script injection. This issue is present in the POST request to the endpoint "/login.php?a=get_upload_list&c=Uploadimgnew". The lack of proper input validation and output encoding makes the application susceptible to XSS attacks.
Exploitation of this vulnerability can lead to severe consequences. Attackers can hijack user sessions and gain unauthorized access to sensitive information. They can perform defacement attacks, altering website content to mislead or harm users. Additionally, attackers can use the vulnerability to execute phishing attacks by redirecting users to malicious websites. Overall, this can compromise the integrity and confidentiality of the affected web application and its users.
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References:
- Upgrade eyoucms to version 1.6.6 or later.
- Implement proper input validation and output encoding.
- Regularly update and patch your CMS software.
- Conduct routine security audits to identify and fix vulnerabilities.
- Educate users on the risks of XSS and how to avoid them.
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