CVE-2025-25107: OneStore Sites CSRF Vulnerability

CVE-2025-25107 Overview

CVE-2025-25107 is a Cross-Site Request Forgery (CSRF) vulnerability affecting the OneStore Sites WordPress plugin developed by sainwp. This vulnerability allows attackers to trick authenticated users into performing unintended actions, specifically enabling arbitrary plugin installation on vulnerable WordPress sites. The flaw affects all versions of OneStore Sites through version 0.1.1.

Critical Impact

This CSRF vulnerability can be chained with arbitrary plugin installation, potentially allowing attackers to gain full control over affected WordPress installations by installing malicious plugins.

Affected Products

• OneStore Sites WordPress plugin version 0.1.1 and earlier
• WordPress installations using the vulnerable OneStore Sites plugin
• Sites utilizing OneStore theme with the Sites companion plugin

Discovery Timeline

• 2025-02-07 - CVE CVE-2025-25107 published to NVD
• 2025-02-07 - Last updated in NVD database

Technical Details for CVE-2025-25107

Vulnerability Analysis

This vulnerability stems from insufficient CSRF token validation in the OneStore Sites WordPress plugin. The plugin fails to properly verify that requests to install plugins originate from legitimate user actions within the WordPress admin interface. Without proper nonce verification or origin checks, attackers can craft malicious web pages that, when visited by an authenticated WordPress administrator, will execute plugin installation requests on the victim's behalf.

The attack can lead to complete site compromise as the attacker-installed plugin can contain arbitrary malicious code, including backdoors, webshells, or data exfiltration mechanisms. The scope is changed (indicated by cross-site impact), meaning the vulnerability can affect resources beyond the security scope of the vulnerable component.

Root Cause

The root cause of this vulnerability is the absence of proper CSRF protection mechanisms (CWE-352) in the plugin's administrative functions. WordPress provides built-in nonce verification functions such as wp_verify_nonce() and check_admin_referer() that should be used to validate the authenticity of form submissions and AJAX requests. The OneStore Sites plugin's failure to implement these security controls on sensitive operations like plugin installation leaves the endpoint vulnerable to cross-site request forgery attacks.

Attack Vector

The attack is network-based and requires user interaction. An attacker must craft a malicious webpage containing a hidden form or JavaScript that targets the vulnerable plugin installation endpoint. When an authenticated WordPress administrator visits this malicious page (through phishing, compromised websites, or malicious advertisements), the browser automatically sends the forged request along with the administrator's session cookies, causing the vulnerable WordPress site to process the plugin installation request as if it were legitimate.

The attack scenario typically involves:

1. Attacker identifies a WordPress site using the vulnerable OneStore Sites plugin
2. Attacker crafts a malicious page with a forged request to install a malicious plugin
3. Attacker tricks a site administrator into visiting the malicious page
4. The administrator's browser sends the request with valid session credentials
5. The vulnerable plugin processes the request and installs the attacker's chosen plugin

Detection Methods for CVE-2025-25107

Indicators of Compromise

• Unexpected plugins installed on WordPress sites without administrator action
• Plugin installation logs showing installations that administrators do not recall performing
• Presence of unknown or suspicious plugins in the wp-content/plugins/ directory
• Web server access logs showing plugin installation requests from external referrers

Detection Strategies

• Review WordPress audit logs for plugin installation activities during suspicious time periods
• Monitor web server access logs for requests to plugin installation endpoints with external Referer headers
• Implement Web Application Firewall (WAF) rules to detect CSRF patterns targeting WordPress admin endpoints
• Use file integrity monitoring to detect unexpected changes to the plugins directory

Monitoring Recommendations

• Enable WordPress activity logging plugins to track administrative actions
• Configure alerts for any new plugin installations on production WordPress sites
• Monitor for unusual administrator session activity patterns
• Implement browser-based security headers including Content-Security-Policy to limit cross-origin requests

How to Mitigate CVE-2025-25107

Immediate Actions Required

• Deactivate and remove the OneStore Sites plugin immediately if running version 0.1.1 or earlier
• Audit installed plugins to identify any unauthorized installations
• Review WordPress admin user sessions and force logout if suspicious activity is detected
• Check for the presence of any backdoors or webshells that may have been installed through this vulnerability

Patch Information

As of the publication date, administrators should check the Patchstack vulnerability database for the latest patch status and recommended remediation steps. If no patch is available, removal of the plugin is strongly recommended until a security update is released by the vendor.

Workarounds

• Remove the OneStore Sites plugin entirely until a patched version is available
• Implement a Web Application Firewall (WAF) with CSRF protection rules
• Restrict WordPress admin access to trusted IP addresses only
• Use browser extensions or security headers to limit cross-origin request capabilities
• Educate administrators about phishing risks and avoiding untrusted links while logged into WordPress

Administrators should add restrictive headers to their WordPress configuration to help mitigate CSRF attacks:

# Add to .htaccess or Apache configuration
<IfModule mod_headers.c>
    Header set X-Frame-Options "SAMEORIGIN"
    Header set X-Content-Type-Options "nosniff"
    Header set Referrer-Policy "strict-origin-when-cross-origin"
</IfModule>