CVE-2018-20601 in UCMS
Summary
by MITRE
UCMS 1.4.7 has XSS via the description parameter in an index.php list_editpost action.
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Analysis
by VulDB Data Team • 04/25/2020
The vulnerability identified as CVE-2018-20601 affects UCMS version 1.4.7 and represents a cross-site scripting flaw that allows attackers to inject malicious scripts into web applications. This particular vulnerability exists within the index.php file where the list_editpost action processes user input through the description parameter. The flaw enables unauthorized individuals to execute arbitrary code in the context of a victim's browser, potentially leading to session hijacking, credential theft, or other malicious activities. The vulnerability stems from insufficient input validation and output sanitization mechanisms within the content management system's administrative interface.
The technical implementation of this XSS vulnerability occurs when user-supplied data from the description parameter is directly incorporated into the web page response without proper encoding or filtering. This allows attackers to embed malicious JavaScript code within the description field during content editing or creation processes. When other users view the affected content, their browsers execute the injected scripts, which can perform actions such as stealing cookies, redirecting users to malicious sites, or modifying page content. The vulnerability is classified as a reflected XSS issue since the malicious payload is reflected back to the user through the application's response without being stored permanently.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to escalate privileges within the UCMS environment. An attacker who successfully exploits this vulnerability gains the ability to manipulate content, potentially injecting malicious scripts into various parts of the website. This can lead to unauthorized access to administrative functions, data manipulation, or the ability to create new user accounts with elevated privileges. The vulnerability affects the integrity and confidentiality of the web application, as it allows unauthorized parties to access sensitive information or modify content in ways that could compromise the entire system. According to CWE standards, this represents a CWE-79: Improper Neutralization of Input During Web Page Generation, which is a fundamental weakness in web application security. The vulnerability also aligns with ATT&CK technique T1213.002 for Data from Information Repositories, as it provides access to content management system data through compromised user sessions.
Mitigation strategies for CVE-2018-20601 should prioritize immediate patching of the UCMS application to version 1.4.8 or later, which contains the necessary security fixes. Organizations should implement comprehensive input validation mechanisms that sanitize all user-supplied data before processing, particularly focusing on the description parameter within the list_editpost action. Web application firewalls can provide additional protection by detecting and blocking malicious payloads attempting to exploit this vulnerability. Regular security assessments and code reviews should be conducted to identify similar input validation weaknesses throughout the application. The implementation of Content Security Policy headers can further limit the impact of successful XSS attacks by restricting script execution sources. Additionally, user education regarding the dangers of clicking suspicious links or visiting untrusted websites can help prevent exploitation through social engineering attacks. Organizations should also consider implementing proper output encoding mechanisms to ensure that any potentially malicious input is rendered harmless when displayed in web browsers. The vulnerability highlights the importance of defense-in-depth strategies and demonstrates how a single input validation flaw can compromise the entire web application security posture.