CVE-2025-31625: Useinfluence Plugin XSS Vulnerability

CVE-2025-31625 Overview

CVE-2025-31625 is a Stored Cross-Site Scripting (XSS) vulnerability affecting the Useinfluence WordPress plugin developed by ramanparashar. This vulnerability stems from improper neutralization of user input during web page generation, allowing attackers to inject malicious scripts that persist in the application and execute in the browsers of other users who view the affected pages.

Stored XSS vulnerabilities are particularly dangerous because the malicious payload is permanently stored on the target server, affecting all users who access the compromised content. In the context of a WordPress plugin, this could allow attackers to steal session cookies, redirect users to malicious sites, deface web content, or perform actions on behalf of authenticated administrators.

Critical Impact

Attackers can inject persistent malicious scripts that execute in victim browsers, potentially leading to session hijacking, credential theft, and complete compromise of WordPress administrator accounts.

Affected Products

• Useinfluence WordPress Plugin version 1.0.8 and earlier
• All WordPress installations running vulnerable versions of the Useinfluence plugin

Discovery Timeline

• 2025-03-31 - CVE-2025-31625 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-31625

Vulnerability Analysis

This vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation), commonly known as Cross-Site Scripting. The Useinfluence plugin fails to properly sanitize, validate, or encode user-supplied input before incorporating it into web pages served to other users.

The attack requires network access and some user interaction (such as an administrator viewing a page containing the injected payload). The vulnerability can affect resources beyond the security scope of the vulnerable component, meaning malicious scripts can potentially access data from other origins or perform cross-domain attacks through the victim's browser session.

The impact includes potential compromise of confidentiality, integrity, and availability of user data and WordPress site functionality. Attackers can leverage this vulnerability to steal sensitive information, modify page content, or disrupt normal site operations.

Root Cause

The root cause of this vulnerability is insufficient input validation and output encoding within the Useinfluence plugin. When user-controlled data is accepted by the plugin and later rendered in web pages without proper sanitization, it creates an opportunity for script injection.

WordPress plugins that handle user input must implement proper escaping functions such as esc_html(), esc_attr(), esc_js(), or wp_kses() to prevent XSS attacks. The Useinfluence plugin versions through 1.0.8 fail to adequately implement these security measures.

Attack Vector

The attack vector for this Stored XSS vulnerability involves an attacker submitting malicious JavaScript code through an input field or parameter processed by the Useinfluence plugin. This malicious payload is then stored in the WordPress database and executed whenever legitimate users view pages that render the compromised content.

The vulnerability requires no special privileges for initial injection in certain scenarios, though user interaction is required for the payload to execute. Once a victim (particularly a WordPress administrator) views the affected page, the malicious script executes with the privileges of that user's session.

The attack flow typically involves: (1) attacker identifies vulnerable input fields in the Useinfluence plugin, (2) malicious JavaScript payload is submitted and stored, (3) when an administrator or user views the affected page, the script executes in their browser context, and (4) the attacker can then steal session tokens, perform administrative actions, or further compromise the WordPress installation.

Detection Methods for CVE-2025-31625

Indicators of Compromise

• Unexpected JavaScript code or HTML tags appearing in database fields associated with the Useinfluence plugin
• Unusual outbound network requests from client browsers when viewing WordPress admin pages
• Reports of unexpected redirects or pop-ups from site visitors
• Suspicious entries in web server access logs showing encoded script payloads in request parameters

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block common XSS payloads in requests targeting WordPress plugin endpoints
• Conduct regular security audits of WordPress plugin database entries for signs of injected scripts
• Deploy browser-based Content Security Policy (CSP) headers to restrict script execution sources
• Use WordPress security plugins that monitor for suspicious content modifications

Monitoring Recommendations

• Enable detailed logging for all WordPress plugin activities, particularly those involving user input processing
• Monitor database queries for INSERT or UPDATE operations containing suspicious script tags or JavaScript event handlers
• Implement real-time alerting for Content Security Policy violations that may indicate XSS exploitation attempts
• Review web server logs for requests containing encoded characters commonly used in XSS payloads (<script>, javascript:, onerror=)

How to Mitigate CVE-2025-31625

Immediate Actions Required

• Update the Useinfluence WordPress plugin to a patched version if available from the plugin developer
• If no patch is available, deactivate and remove the Useinfluence plugin until a security update is released
• Review WordPress database for any suspicious content that may have been injected through this vulnerability
• Implement Content Security Policy headers to provide defense-in-depth against XSS attacks
• Force password resets for all administrative users if exploitation is suspected

Patch Information

As of the last update, the vulnerability affects Useinfluence plugin versions through 1.0.8. Site administrators should check for updates through the WordPress plugin repository or contact the plugin developer directly. For the latest vulnerability details and patch status, refer to the Patchstack Vulnerability Report.

Workarounds

• Temporarily disable or uninstall the Useinfluence plugin until a patched version is available
• Implement strict Content Security Policy headers that restrict inline script execution using directives like script-src 'self'
• Use a WordPress security plugin or WAF to filter malicious input targeting the Useinfluence plugin endpoints
• Restrict access to the WordPress admin panel to trusted IP addresses to limit potential attack surface

# WordPress Content Security Policy configuration example
# Add to .htaccess or web server configuration

# Apache configuration
<IfModule mod_headers.c>
    Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; frame-ancestors 'self';"
    Header set X-XSS-Protection "1; mode=block"
    Header set X-Content-Type-Options "nosniff"
</IfModule>