CVE-2017-18541 in xo-security Plugin
Summary
by MITRE
The xo-security plugin before 1.5.3 for WordPress has XSS.
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Analysis
by VulDB Data Team • 11/26/2023
The CVE-2017-18541 vulnerability affects the xo-security plugin version 1.5.2 and earlier for WordPress, representing a cross-site scripting flaw that poses significant security risks to WordPress installations. This vulnerability specifically resides within the plugin's handling of user input and output filtering mechanisms, creating an exploitable condition where malicious actors can inject malicious scripts into web pages viewed by other users. The vulnerability stems from insufficient sanitization of data passed through various parameters within the plugin's administrative interfaces and front-end components, allowing attackers to execute arbitrary JavaScript code in the context of a victim's browser session.
The technical implementation of this XSS vulnerability occurs when the plugin fails to properly escape or filter user-supplied data before rendering it in HTML output contexts. Attackers can leverage this weakness by crafting malicious payloads that exploit input fields, URL parameters, or form submissions within the plugin's functionality. The vulnerability typically manifests when the plugin processes user input without adequate validation or sanitization, enabling attackers to inject script tags or other malicious content that executes in the browser of unsuspecting users. This flaw can be particularly dangerous in administrative contexts where authenticated users with elevated privileges might be tricked into executing malicious code, potentially leading to complete compromise of the WordPress installation.
The operational impact of CVE-2017-18541 extends beyond simple script execution, as it can enable attackers to perform various malicious activities including credential theft, session hijacking, defacement of web content, and redirection to malicious sites. The vulnerability's exploitation can result in unauthorized access to sensitive administrative functions, data exfiltration, and the potential for privilege escalation within the WordPress environment. Given that the xo-security plugin is designed to provide security enhancements, this vulnerability creates a particularly ironic situation where the security tool itself becomes a vector for attacks. The impact is amplified in environments where multiple administrators interact with the plugin's interfaces, as the attack surface increases with the number of potential victims.
Mitigation strategies for this vulnerability require immediate plugin updates to version 1.5.3 or later, where the XSS flaws have been addressed through proper input sanitization and output escaping mechanisms. Administrators should implement comprehensive security monitoring to detect any suspicious activities that might indicate exploitation attempts, while also ensuring that all WordPress core installations and plugins remain current with the latest security patches. The vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws in software applications, and can be mapped to ATT&CK technique T1059.007 for script execution and T1566 for social engineering attacks that might leverage the vulnerability. Additional defensive measures include implementing content security policies, conducting regular security audits of installed plugins, and maintaining detailed logs of plugin usage to detect anomalous behavior patterns that might indicate exploitation attempts.