CVE-2018-12429 in JEESNS
Summary
by MITRE
JEESNS through 1.2.1 allows XSS attacks by ordinary users who publish articles containing a crafted payload in order to capture an administrator cookie.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 03/08/2020
The vulnerability identified as CVE-2018-12429 represents a critical cross-site scripting flaw within the JEESNS content management system version 1.2.1 and earlier. This security weakness enables ordinary users to inject malicious scripts into the system through article publication functionality, creating a significant risk to administrative accounts and overall system integrity. The vulnerability specifically exploits the lack of proper input validation and output sanitization mechanisms within the article publishing module, allowing attackers to craft malicious payloads that execute in the context of administrator sessions.
The technical implementation of this vulnerability stems from insufficient sanitization of user input within the article submission process. When users publish articles containing crafted malicious scripts, these payloads are stored within the system's database and subsequently rendered on pages viewed by administrators. This creates an ideal environment for cookie theft attacks, as the malicious scripts can access and exfiltrate administrative session cookies through techniques such as document.cookie access or XMLHttpRequest methods. The flaw operates at the application layer and specifically targets the web application's trust model, where user-generated content is not adequately filtered before being displayed to privileged users.
The operational impact of CVE-2018-12429 extends beyond simple data theft, as successful exploitation can lead to complete administrative account compromise and unauthorized system access. Attackers can leverage stolen cookies to impersonate administrators, modify content, access sensitive user data, and potentially escalate privileges within the system. This vulnerability directly maps to CWE-79 Cross-site Scripting and aligns with ATT&CK technique T1566.001 Initial Access: Spearphishing Attachment, as it enables attackers to establish persistent access through compromised administrative sessions. The attack vector is particularly dangerous because it requires minimal privileges to exploit, making it accessible to any registered user within the system.
Mitigation strategies for this vulnerability should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application. The system must employ proper sanitization of all user-generated content before storage and rendering, utilizing libraries such as HTML escaping or context-aware encoding. Additionally, implementing Content Security Policy headers can prevent execution of unauthorized scripts even if the vulnerability is exploited. Regular security audits and input validation testing should be conducted to prevent similar issues in future releases. The system should also implement proper session management practices including secure cookie attributes and session timeout mechanisms to minimize the impact of any successful exploitation attempts.