CVE-2023-2057 in EyouCms
Summary
by MITRE • 04/14/2023
A vulnerability was found in EyouCms 1.5.4. It has been classified as problematic. Affected is an unknown function of the file login.php?m=admin&c=Arctype&a=edit of the component New Picture Handler. The manipulation of the argument litpic_loca leads to cross site scripting. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. VDB-225942 is the identifier assigned to this vulnerability.
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Analysis
by VulDB Data Team • 05/03/2023
This vulnerability exists within EyouCms version 1.5.4, specifically in the New Picture Handler component where an improperly validated input parameter creates a cross-site scripting opportunity. The flaw is located in the login.php file within the admin section, specifically in the Arctype edit functionality where the litpic_loca argument is processed without adequate sanitization measures. The vulnerability stems from insufficient input validation and output encoding practices that allow malicious payloads to be injected into the application's response. This particular weakness enables attackers to execute arbitrary JavaScript code within the context of a victim's browser when the affected page is accessed.
The technical exploitation of this vulnerability occurs through the manipulation of the litpic_loca parameter which is used to handle image location data within the content management system. When an attacker crafts a malicious payload and submits it through this parameter, the application fails to properly sanitize the input before rendering it in the web page. This allows an attacker to inject malicious scripts that can be executed in the browser context of authenticated users, potentially leading to session hijacking, data theft, or further privilege escalation. The vulnerability is classified as remotely exploitable, meaning that an attacker does not require physical access to the system or local network privileges to carry out the attack, which significantly increases its potential impact and attack surface.
The operational impact of this vulnerability extends beyond simple script execution, as it can be leveraged for more sophisticated attacks within the context of the web application. An attacker could potentially steal user sessions, modify content, or even gain administrative privileges depending on the level of access available to the compromised user. The vulnerability affects the integrity and confidentiality of the application's data and user interactions, as the XSS payload can be designed to exfiltrate sensitive information or redirect users to malicious sites. Given that this vulnerability has been publicly disclosed and is known to be exploitable, it represents an immediate security risk to any organization running the affected EyouCms version.
Organizations should prioritize immediate remediation by upgrading to a patched version of EyouCms that addresses this XSS vulnerability. The mitigation strategy should include implementing proper input validation and output encoding mechanisms throughout the application, particularly for all user-supplied data that is rendered in web pages. Security measures should follow established frameworks such as the CWE-79 mitigation guidelines which recommend proper encoding of output data and validation of all input parameters. Additionally, implementing a web application firewall that can detect and block malicious XSS payloads would provide an additional layer of protection. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in other components of the application stack, as this vulnerability demonstrates the importance of secure coding practices and input sanitization across all application interfaces. The ATT&CK framework would categorize this vulnerability under the T1566 technique for initial access through web application attacks, highlighting the need for comprehensive security controls that address both application-level and network-level defenses.