CVE-2025-31067: Seven Stars Stored XSS Vulnerability

CVE-2025-31067 Overview

CVE-2025-31067 is a Stored Cross-Site Scripting (XSS) vulnerability discovered in the Seven Stars WordPress theme developed by themeton. This vulnerability stems from improper neutralization of input during web page generation, allowing attackers to inject malicious scripts that persist in the application and execute when other users view affected pages.

Stored XSS vulnerabilities are particularly dangerous because the malicious payload is permanently stored on the target server, such as in a database or theme configuration. When legitimate users access the affected pages, the injected script executes in their browser context, potentially leading to session hijacking, credential theft, or further attacks against the WordPress installation.

Critical Impact

Attackers can inject persistent malicious scripts that execute in the browsers of any user viewing affected pages, potentially compromising administrator sessions and enabling full site takeover.

Affected Products

• themeton Seven Stars WordPress Theme versions through 1.4.4
• WordPress installations running vulnerable Seven Stars theme versions

Discovery Timeline

• 2025-06-27 - CVE-2025-31067 published to NVD
• 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-31067

Vulnerability Analysis

This Stored XSS vulnerability (CWE-79) in the Seven Stars WordPress theme allows attackers to inject malicious JavaScript code that gets stored on the server and executed whenever other users access the affected content. The vulnerability exists due to insufficient input sanitization and output encoding within the theme's functionality.

WordPress themes often handle user-controllable input for various customization features, shortcodes, or widget configurations. When this input is not properly sanitized before storage or encoded before rendering in HTML output, it creates an opportunity for XSS attacks. The changed scope in this vulnerability indicates that successful exploitation can impact resources beyond the vulnerable component, affecting the broader security context of the WordPress installation.

The network-based attack vector with low complexity means exploitation requires no special privileges beyond the ability to submit input to the vulnerable functionality. However, user interaction is required—a victim must view the page containing the injected payload for the attack to succeed.

Root Cause

The root cause of CVE-2025-31067 is improper neutralization of input during web page generation. The Seven Stars theme fails to adequately sanitize user-supplied input before storing it and does not properly encode this data when rendering it in HTML pages. This allows specially crafted input containing JavaScript code to be treated as executable script rather than display text.

WordPress provides built-in sanitization functions such as sanitize_text_field(), esc_html(), and wp_kses() specifically designed to prevent XSS attacks. The vulnerable code paths in Seven Stars theme versions through 1.4.4 do not properly utilize these security functions, leaving the application vulnerable to script injection.

Attack Vector

Exploitation of this Stored XSS vulnerability follows a typical attack pattern:

1. An attacker identifies an input field or parameter within the Seven Stars theme that lacks proper sanitization
2. The attacker submits a payload containing malicious JavaScript code through this input
3. The theme stores the unsanitized input in the WordPress database
4. When any user (including administrators) visits a page that renders this stored content, the malicious script executes in their browser
5. The script can then perform actions such as stealing session cookies, capturing keystrokes, redirecting users, or making authenticated requests on behalf of the victim

For detailed technical information, refer to the Patchstack Vulnerability Report.

Detection Methods for CVE-2025-31067

Indicators of Compromise

• Unexpected JavaScript code present in theme configuration options, widget settings, or stored content
• Unusual <script> tags or event handlers (e.g., onerror, onload, onclick) in database entries associated with the Seven Stars theme
• Reports from users about unexpected browser behavior, redirects, or popup dialogs when viewing WordPress pages
• Web Application Firewall (WAF) logs showing blocked XSS payloads targeting Seven Stars theme endpoints

Detection Strategies

• Enable WordPress debug logging and monitor for suspicious input patterns containing script tags or JavaScript event handlers
• Deploy a Web Application Firewall (WAF) with XSS detection rules to identify and block exploitation attempts
• Utilize WordPress security plugins that scan for malicious content in the database and theme configurations
• Implement Content Security Policy (CSP) headers to detect and report inline script execution attempts

Monitoring Recommendations

• Monitor WordPress database tables for entries containing potential XSS payloads such as <script>, javascript:, or encoded variants
• Review web server access logs for POST requests to theme-related endpoints with suspicious payloads
• Configure browser security headers reporting to detect CSP violations that may indicate XSS execution attempts
• Regularly audit theme settings and customization options for unexpected or malicious content

How to Mitigate CVE-2025-31067

Immediate Actions Required

• Update the Seven Stars WordPress theme to a version newer than 1.4.4 that addresses this vulnerability
• Review and audit any user-generated or customizable content stored by the theme for malicious scripts
• Implement a Web Application Firewall with XSS protection rules as an additional defense layer
• Consider temporarily deactivating the Seven Stars theme if an update is not immediately available

Patch Information

Users of the Seven Stars WordPress theme should check for updates through the WordPress admin dashboard or the theme's official source. The Patchstack Vulnerability Report provides additional details about the vulnerability and remediation guidance.

Ensure automatic theme updates are enabled in WordPress to receive security patches promptly:

1. Navigate to Appearance → Themes in the WordPress admin
2. Select the Seven Stars theme
3. Enable automatic updates if the option is available

Workarounds

• Implement Content Security Policy (CSP) headers to restrict inline script execution and mitigate XSS impact
• Use WordPress security plugins like Wordfence or Sucuri that provide virtual patching capabilities for known vulnerabilities
• Restrict access to theme customization features to only trusted administrators until the theme is updated
• Consider switching to an alternative WordPress theme if the vulnerability cannot be promptly addressed

# Example Content Security Policy header configuration for Apache
# Add to .htaccess or Apache configuration
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline';"