CVE-2025-53426: Likert Survey Master XSS Vulnerability

CVE-2025-53426 Overview

CVE-2025-53426 is a Reflected Cross-Site Scripting (XSS) vulnerability affecting the Likert Survey Master WordPress plugin developed by Bob Likert. This vulnerability arises from improper neutralization of user-supplied input during web page generation, allowing attackers to inject malicious scripts that execute in the context of a victim's browser session.

Critical Impact

Attackers can exploit this reflected XSS vulnerability to steal session cookies, capture user credentials, redirect users to malicious websites, or perform actions on behalf of authenticated WordPress users including administrators.

Affected Products

• Likert Survey Master WordPress Plugin versions through 0.8.0.1
• WordPress installations running vulnerable versions of the plugin
• All users interacting with affected WordPress sites

Discovery Timeline

• 2025-10-22 - CVE-2025-53426 published to NVD
• 2026-01-20 - Last updated in NVD database

Technical Details for CVE-2025-53426

Vulnerability Analysis

This vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation). The Likert Survey Master plugin fails to properly sanitize user-controlled input before reflecting it back in the rendered HTML output. This lack of input validation enables attackers to craft malicious URLs containing JavaScript payloads that execute when victims click the link.

The attack requires user interaction—specifically, a victim must click a specially crafted link containing the malicious payload. Once clicked, the injected script executes within the security context of the vulnerable WordPress site, giving the attacker access to sensitive data including session tokens, cookies, and the ability to perform authenticated actions.

Root Cause

The root cause of this vulnerability stems from insufficient input sanitization and output encoding within the Likert Survey Master plugin. User-supplied data is directly incorporated into the HTML response without proper escaping or validation, allowing arbitrary JavaScript code to be injected and executed. WordPress plugins that handle survey functionality often process numerous input parameters, and any unvalidated parameter can become an XSS vector.

Attack Vector

The attack is network-based and requires no authentication, though user interaction is necessary. An attacker would craft a malicious URL containing an XSS payload targeting a vulnerable parameter in the Likert Survey Master plugin. This URL would then be distributed through phishing emails, social media, or other channels to lure victims into clicking.

Upon clicking the malicious link, the victim's browser sends a request to the vulnerable WordPress site, which reflects the attacker's payload back in the response without sanitization. The browser then executes the malicious script, potentially allowing the attacker to hijack sessions, steal credentials, or perform administrative actions if the victim is a WordPress administrator.

The vulnerability mechanism involves URL parameters being reflected into the page output without proper HTML entity encoding or JavaScript escaping. For detailed technical information, refer to the Patchstack Security Vulnerability Report.

Detection Methods for CVE-2025-53426

Indicators of Compromise

• Suspicious URLs containing encoded JavaScript payloads in query parameters targeting survey functionality
• Web server logs showing requests with <script> tags or JavaScript event handlers in URL parameters
• Unusual cross-domain requests originating from your WordPress site to unknown external domains
• User reports of unexpected behavior or redirects when interacting with survey pages

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block common XSS patterns in request parameters
• Monitor server access logs for URL-encoded JavaScript payloads such as %3Cscript%3E or event handlers like onerror=
• Deploy Content Security Policy (CSP) headers to restrict inline script execution and report violations
• Use browser-based XSS auditors and security scanners to test for reflected input in responses

Monitoring Recommendations

• Enable WordPress security plugin logging to track suspicious plugin interactions
• Configure real-time alerting for web traffic containing known XSS payload signatures
• Regularly review web server logs for anomalous query string patterns targeting plugin endpoints
• Implement honeypot parameters to detect automated XSS scanning attempts

How to Mitigate CVE-2025-53426

Immediate Actions Required

• Deactivate the Likert Survey Master plugin immediately if it is not critical to site operations
• Audit WordPress user accounts for any unauthorized access or privilege changes
• Review server logs for evidence of exploitation attempts targeting the plugin
• Notify site administrators and users about the potential risk

Patch Information

As of the last CVE update, the vulnerability affects Likert Survey Master versions through 0.8.0.1. Check the WordPress plugin repository and the Patchstack Security Vulnerability Report for updates on patched versions. Update to the latest version once a security fix is released.

Workarounds

• Implement a Web Application Firewall (WAF) with XSS filtering rules to block malicious requests
• Add Content Security Policy headers to prevent inline script execution: Content-Security-Policy: script-src 'self'
• Use WordPress security plugins to add additional input sanitization layers
• Consider replacing the vulnerable plugin with an alternative survey solution until a patch is available

# Add Content Security Policy header in .htaccess
<IfModule mod_headers.c>
    Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'"
    Header set X-XSS-Protection "1; mode=block"
    Header set X-Content-Type-Options "nosniff"
</IfModule>