CVE-2018-12902 in Easy Magazine
Summary
by MITRE
In Easy Magazine through 2012-10-26, there is XSS in the search bar of the web site.
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Analysis
by VulDB Data Team • 02/22/2020
The vulnerability identified as CVE-2018-12902 represents a cross-site scripting flaw discovered in the Easy Magazine WordPress theme version released on or before October 26, 2012. This security weakness specifically affects the search functionality of the website, creating an avenue for malicious actors to inject and execute arbitrary script code within the context of other users' browsers. The vulnerability stems from inadequate input validation and output sanitization mechanisms within the theme's search bar implementation, allowing attackers to craft malicious payloads that persist in the search functionality and execute when other users interact with the compromised interface.
The technical exploitation of this vulnerability aligns with CWE-79, which categorizes cross-site scripting as a critical web application security flaw. The flaw occurs when user-supplied input from the search bar is not properly escaped or filtered before being rendered back to users in the web interface. This creates a persistent XSS vector where attackers can inject malicious JavaScript code that executes in the victim's browser context, potentially leading to session hijacking, credential theft, or redirection to malicious sites. The vulnerability is particularly concerning as it affects the core search functionality, which is frequently used by website visitors, maximizing the potential impact of successful exploitation.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to establish persistent access to compromised websites through session manipulation and credential harvesting. When users perform searches containing malicious payloads, any subsequent page views or interactions with the search results can trigger the execution of attacker-controlled code. This creates a significant risk for website administrators and their visitors, as the attack vector is integrated into the normal website usage patterns, making detection more challenging. The vulnerability also represents a failure in the principle of least privilege and proper input validation, as the theme does not adequately protect against malicious input in its core functionality.
Mitigation strategies for CVE-2018-12902 should prioritize immediate patching of the Easy Magazine theme to the latest available version that addresses the XSS vulnerability. Website administrators must implement comprehensive input validation and output encoding mechanisms to prevent malicious scripts from being executed in the search functionality. The implementation of Content Security Policy headers and proper sanitization of all user inputs can significantly reduce the risk of exploitation. Additionally, regular security audits and vulnerability assessments should be conducted to identify similar issues in other themes and plugins. Organizations should also consider implementing web application firewalls to detect and block malicious search queries, while maintaining updated security monitoring systems to identify potential exploitation attempts. The vulnerability demonstrates the importance of keeping WordPress themes and plugins updated, as this issue was likely resolved in subsequent releases through proper input sanitization and output encoding practices that align with industry best practices for preventing XSS attacks.