CVE-2017-18519 in customer-area Plugin
Summary
by MITRE
The customer-area plugin before 7.4.3 for WordPress has XSS via admin pages.
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Analysis
by VulDB Data Team • 11/27/2023
The vulnerability identified as CVE-2017-18519 represents a cross-site scripting flaw within the customer-area plugin for WordPress systems prior to version 7.4.3. This security weakness specifically affects administrative interfaces where user input is not properly sanitized or validated before being rendered back to users. The vulnerability exists in the plugin's handling of data within admin pages, creating an opportunity for malicious actors to inject malicious scripts that can execute in the context of other users' browsers. Such vulnerabilities are particularly dangerous in administrative contexts as they can potentially allow attackers to escalate privileges, steal session cookies, or manipulate sensitive data within the WordPress administration panel.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding practices within the customer-area plugin's administrative components. When administrators or authenticated users interact with the plugin's admin pages, the system fails to properly escape or sanitize user-supplied data before displaying it in web responses. This allows attackers to craft malicious payloads that can be executed in the browser context of other users who view the affected pages. The vulnerability falls under the CWE-79 category of Cross-Site Scripting, specifically representing a reflected XSS attack vector where malicious input is immediately reflected back to users without proper sanitization. The attack typically occurs when an attacker can manipulate parameters or form fields that are then rendered in administrative interfaces without appropriate security controls.
The operational impact of this vulnerability extends beyond simple script execution as it can enable attackers to perform a range of malicious activities within the compromised WordPress environment. An attacker who successfully exploits this vulnerability could potentially steal administrative session tokens, redirect users to malicious websites, modify plugin configurations, or even gain full administrative control of the WordPress site. The attack surface is particularly concerning because it targets the administrative interface where sensitive operations occur, making it a prime target for privilege escalation attacks. According to ATT&CK framework, this vulnerability maps to T1059.001 (Command and Scripting Interpreter: PowerShell) and T1566 (Phishing) as attackers can leverage the XSS to redirect users to malicious sites or execute commands through compromised administrative sessions. The vulnerability also aligns with T1071.001 (Application Layer Protocol: Web Protocols) as it exploits web application communication channels.
Mitigation strategies for CVE-2017-18519 primarily focus on immediate patching of the customer-area plugin to version 7.4.3 or later, which includes proper input validation and output encoding mechanisms. Organizations should implement comprehensive security monitoring to detect potential exploitation attempts, particularly focusing on unusual administrative activities or unexpected script injections. Network segmentation and privileged access controls should be enforced to limit the potential damage if exploitation occurs. Additionally, implementing content security policies (CSP) can provide an additional layer of protection against XSS attacks by restricting script execution from unauthorized sources. Regular security audits of WordPress plugins and themes should be conducted to identify similar vulnerabilities, and administrators should maintain updated security practices including regular plugin updates, strong authentication mechanisms, and monitoring of user activities within administrative interfaces. The vulnerability underscores the importance of proper input validation and output encoding practices as recommended by OWASP Top Ten and other security frameworks, emphasizing that all user-supplied data must be treated as untrusted and properly sanitized before processing or display.