CVE-2022-2115 in Popup Anything Plugin
Summary
by MITRE • 07/25/2022
The Popup Anything WordPress plugin before 2.1.7 does not sanitise and escape a parameter before outputting it back in a frontend page, leading to a Reflected Cross-Site Scripting
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Analysis
by VulDB Data Team • 08/20/2022
The Popup Anything WordPress plugin vulnerability represents a critical security flaw that emerged in versions prior to 2.1.7, exposing WordPress websites to reflected cross-site scripting attacks. This vulnerability resides within the plugin's handling of user-supplied input parameters that are not properly sanitized or escaped before being rendered back to users in the frontend interface. The issue creates a pathway for malicious actors to inject arbitrary JavaScript code into web pages viewed by unsuspecting users, potentially compromising their browser sessions and executing unauthorized actions on their behalf.
The technical implementation of this vulnerability stems from inadequate input validation within the plugin's codebase where a specific parameter is directly incorporated into the HTML output without proper sanitization measures. This flaw allows attackers to craft malicious payloads that exploit the reflected XSS mechanism by embedding script tags or other malicious code within the vulnerable parameter. When a victim visits a specially crafted URL containing the malicious input, the plugin processes this unvalidated parameter and reflects it back in the page, executing the injected script within the victim's browser context. The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws in web applications and represents a classic reflected XSS pattern that has been documented extensively in cybersecurity literature.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable sophisticated attack vectors including session hijacking, credential theft, and redirection to malicious domains. Attackers can leverage this vulnerability to steal administrator cookies, gain unauthorized access to WordPress admin panels, or manipulate the plugin's functionality to serve malicious content to other users. The reflected nature of the vulnerability means that attacks can be delivered through phishing emails, compromised links, or social engineering campaigns without requiring persistent access to the target system. This makes the vulnerability particularly dangerous in environments where multiple users interact with the plugin's frontend features.
Organizations should prioritize immediate remediation by upgrading to Popup Anything plugin version 2.1.7 or later, which implements proper input sanitization and output escaping mechanisms. Security teams should also implement additional defensive measures including web application firewalls that can detect and block suspicious input patterns, regular security audits of WordPress plugins, and monitoring for anomalous user behavior or unexpected script execution. The vulnerability demonstrates the importance of following secure coding practices as outlined in the OWASP Top Ten and ATT&CK framework's web application exploitation techniques, particularly those related to client-side attacks and credential exposure. Organizations should conduct comprehensive vulnerability assessments to identify other plugins or components that may be susceptible to similar input validation flaws, as reflected XSS vulnerabilities continue to represent one of the most prevalent attack vectors in web applications.