CVE-2025-52783: WooCommerce CSRF & Stored XSS Flaw

CVE-2025-52783 Overview

CVE-2025-52783 is a Cross-Site Request Forgery (CSRF) vulnerability in the themelocation Change Cart button Colors WooCommerce plugin (wc-style) for WordPress. The flaw affects all versions up to and including 1.0. Because the plugin lacks CSRF token validation on state-changing requests, an attacker can trick an authenticated administrator into submitting a forged request that stores attacker-controlled JavaScript. The result is a Stored Cross-Site Scripting (XSS) condition triggered via CSRF, classified under CWE-352.

Critical Impact

A successful attack injects persistent JavaScript into the WooCommerce site, enabling session theft, admin account takeover, and arbitrary actions performed in the victim's browser context.

Affected Products

• themelocation Change Cart button Colors WooCommerce plugin (wc-style)
• All versions from initial release through 1.0
• WordPress sites running WooCommerce with this plugin installed

Discovery Timeline

• 2025-06-20 - CVE-2025-52783 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-52783

Vulnerability Analysis

The plugin exposes administrative functionality that modifies stored configuration values used to render cart button styling. The request handler accepts POST submissions without verifying a WordPress nonce or origin header. An attacker hosts a malicious page containing a hidden form or fetch() call that targets the plugin's settings endpoint. When a logged-in WordPress administrator visits the attacker's page, the browser automatically attaches authentication cookies and submits the forged request.

Because the plugin also fails to sanitize and escape the submitted style values, the attacker can inject HTML and JavaScript payloads that are persisted in the database. Each subsequent page render that outputs the stored style content executes the attacker-controlled script in every visitor's browser, including other administrators.

The attack chain combines two weaknesses: missing CSRF protection on the configuration save action and missing output encoding when the value is later rendered. User interaction is required since the administrator must visit the attacker-controlled page while authenticated.

Root Cause

The root cause is the absence of nonce verification using wp_verify_nonce() or check_admin_referer() on the plugin's settings save handler. Additionally, input is stored without sanitization helpers such as sanitize_text_field() and rendered without esc_attr() or esc_html(), enabling the Stored XSS payload to persist and execute.

Attack Vector

Exploitation requires the attacker to lure an authenticated WordPress administrator to a malicious URL. The forged request changes plugin settings to embed a JavaScript payload inside the cart button style output. From that point, the payload executes for every site visitor or admin who loads pages where the style is rendered, completing the Stored XSS impact. See the Patchstack advisory for additional technical detail.

Detection Methods for CVE-2025-52783

Indicators of Compromise

• Unexpected <script> tags, javascript: URIs, or event handlers stored in WooCommerce style-related options in wp_options
• Outbound HTTP requests from visitor browsers to unknown domains originating on cart or checkout pages
• Recently modified plugin settings without a corresponding admin login from a known source IP
• New or modified administrator accounts created shortly after a settings change

Detection Strategies

• Review HTTP referer logs for POST requests to the plugin's admin settings endpoint that originate from external domains
• Scan the WordPress database for stored option values containing <script, onerror=, or onload= substrings
• Use a web application firewall to log and alert on POST requests to plugin admin actions missing the _wpnonce parameter
• Compare current plugin configuration against a known-good baseline on a recurring schedule

Monitoring Recommendations

• Enable WordPress audit logging for plugin settings changes and administrator authentication events
• Configure Content Security Policy (CSP) headers and alert on CSP violation reports
• Monitor for anomalous JavaScript execution on storefront pages using browser-side script integrity checks
• Track plugin file integrity and database option changes to detect unauthorized modifications

How to Mitigate CVE-2025-52783

Immediate Actions Required

• Deactivate and remove the Change Cart button Colors WooCommerce plugin until a fixed version is released
• Audit the wp_options table and remove any malicious script content from plugin-related entries
• Force password resets and invalidate active sessions for all administrator accounts
• Review recent administrator activity and roll back any unauthorized changes

Patch Information

At the time of publication, no patched version is listed in the Patchstack advisory. All versions through 1.0 remain vulnerable. Site operators should monitor the plugin repository for an updated release and apply it immediately once available.

Workarounds

• Remove the plugin entirely and apply cart button styling through theme CSS or an actively maintained alternative
• Restrict access to /wp-admin/ by IP allowlist to reduce CSRF exposure for administrator sessions
• Deploy a web application firewall rule that blocks state-changing POST requests to plugin endpoints lacking a valid _wpnonce parameter
• Enforce a strict Content Security Policy that disallows inline scripts on storefront pages

# Example WAF rule (ModSecurity) blocking plugin admin POSTs without a nonce
SecRule REQUEST_METHOD "@streq POST" \
  "chain,id:1052783,phase:2,deny,status:403,log,msg:'CVE-2025-52783 CSRF block'"
  SecRule REQUEST_URI "@contains /wp-admin/admin.php?page=wc-style" \
    "chain"
    SecRule &ARGS:_wpnonce "@eq 0"