CVE-2025-53315: Relocate Upload CSRF Vulnerability

CVE-2025-53315 Overview

CVE-2025-53315 is a Cross-Site Request Forgery (CSRF) vulnerability in the WordPress Relocate Upload plugin (relocate-upload) developed by alanft. This security flaw allows attackers to leverage CSRF to achieve Stored Cross-Site Scripting (XSS), creating a chained attack scenario that can compromise WordPress administrators and site visitors.

The vulnerability exists because the plugin fails to properly validate request origins for sensitive operations. An attacker can craft a malicious page that, when visited by an authenticated administrator, executes unauthorized actions in the context of the victim's session. The resulting Stored XSS payload persists in the application, affecting all subsequent visitors who access the compromised content.

Critical Impact

This CSRF-to-Stored-XSS vulnerability chain can lead to session hijacking, administrative account compromise, website defacement, and malware distribution to site visitors.

Affected Products

• WordPress Relocate Upload plugin versions through 0.24.1
• All WordPress installations using vulnerable versions of relocate-upload
• Websites where administrators access untrusted links while authenticated

Discovery Timeline

• 2025-06-27 - CVE-2025-53315 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-53315

Vulnerability Analysis

This vulnerability combines two distinct attack vectors into a chained exploitation scenario. The primary vulnerability is Cross-Site Request Forgery (CWE-352), which occurs when the Relocate Upload plugin processes state-changing requests without proper anti-CSRF token validation. The secondary impact is Stored XSS, where attacker-controlled data persists in the application database.

The attack requires user interaction—specifically, an authenticated WordPress administrator must visit an attacker-controlled page or click a malicious link. Once triggered, the CSRF payload executes operations with the administrator's privileges, injecting malicious JavaScript that becomes permanently stored in the WordPress database.

The scope of impact extends beyond the initially targeted user (Changed Scope), as the stored XSS payload affects all subsequent visitors to the compromised pages. This creates a persistent threat that continues until the malicious content is manually identified and removed.

Root Cause

The root cause is the absence of proper CSRF protection mechanisms in the Relocate Upload plugin's request handling logic. WordPress provides built-in nonce functionality through wp_nonce_field() and wp_verify_nonce() functions, but the vulnerable plugin endpoints fail to implement these security controls. Without nonce verification, the plugin cannot distinguish between legitimate administrator requests and forged requests initiated by attackers.

Additionally, the plugin lacks proper output encoding and input sanitization, enabling the secondary Stored XSS vulnerability. User-supplied data is stored in the database and later rendered in administrative or front-end contexts without adequate escaping.

Attack Vector

The attack follows a multi-stage exploitation chain:

1. Reconnaissance: The attacker identifies a WordPress site running the vulnerable Relocate Upload plugin (version 0.24.1 or earlier)
2. Payload Crafting: The attacker creates a malicious HTML page containing a hidden form that submits to the vulnerable plugin endpoint with XSS payload data
3. Social Engineering: The attacker tricks a logged-in WordPress administrator into visiting the malicious page through phishing or other social engineering techniques
4. CSRF Exploitation: When the administrator's browser loads the malicious page, JavaScript automatically submits the hidden form, sending a forged request to the WordPress installation
5. XSS Storage: The plugin processes the forged request and stores the attacker's JavaScript payload in the database
6. Persistent Compromise: All users who subsequently view pages containing the stored XSS payload have the malicious script execute in their browsers

The attack leverages the network-based attack vector, requires no prior authentication from the attacker, and only needs the victim to perform a simple action like clicking a link.

Detection Methods for CVE-2025-53315

Indicators of Compromise

• Unexpected JavaScript code appearing in WordPress database tables related to upload configurations or media settings
• Suspicious outbound connections from visitor browsers to unknown external domains
• Administrative actions in WordPress audit logs that the administrator does not recall performing
• Modified plugin settings or newly injected content in pages served by the Relocate Upload plugin

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block cross-origin form submissions targeting WordPress plugin endpoints
• Monitor WordPress database for unauthorized modifications to plugin settings and stored content
• Deploy browser-based XSS detection through Content Security Policy (CSP) violation reporting
• Review server access logs for unusual POST requests to Relocate Upload plugin endpoints lacking proper referer headers

Monitoring Recommendations

• Enable WordPress audit logging to track all administrative actions and plugin configuration changes
• Configure alerts for database modifications to tables associated with the Relocate Upload plugin
• Implement CSP headers with report-uri directive to receive notifications of inline script execution attempts
• Regularly scan WordPress installations for known vulnerable plugin versions using security scanning tools

How to Mitigate CVE-2025-53315

Immediate Actions Required

• Update the Relocate Upload plugin to a patched version when available from the developer
• If no patch is available, consider temporarily deactivating the Relocate Upload plugin until a fix is released
• Implement a Web Application Firewall with CSRF and XSS protection rules
• Review WordPress database for any signs of stored XSS payloads and remove suspicious content
• Educate administrators about the risks of clicking untrusted links while logged into WordPress

Patch Information

As of the last update, the vulnerability affects Relocate Upload plugin versions through 0.24.1. Administrators should monitor the Patchstack WordPress Plugin Advisory for updates on patch availability and remediation guidance from the plugin developer.

Workarounds

• Restrict administrator access to trusted networks and avoid accessing external links while authenticated to WordPress
• Implement browser extensions that block cross-origin form submissions for administrators
• Apply additional server-side validation by adding custom code to verify nonces on plugin requests (advanced users only)
• Consider migrating to alternative upload relocation plugins that implement proper CSRF protections

# WordPress security configuration recommendations
# Add to wp-config.php to enhance session security

# Force SSL for admin panel
define('FORCE_SSL_ADMIN', true);

# Limit login session duration
define('AUTH_KEY', 'your-unique-secure-key');
define('SECURE_AUTH_KEY', 'your-unique-secure-key');

# Enable automatic updates for security patches
define('WP_AUTO_UPDATE_CORE', 'minor');