CVE-2025-39453: WooCommerce Dynamic Pricing CSRF Flaw

CVE-2025-39453 Overview

CVE-2025-39453 is a Cross-Site Request Forgery (CSRF) vulnerability affecting the Advanced Dynamic Pricing for WooCommerce WordPress plugin by algol.plus. The flaw exists in versions up to and including 4.9.3 and is tracked under [CWE-352]. An attacker who tricks an authenticated administrator into visiting a crafted page can trigger unauthorized state-changing requests, resulting in plugin settings modification without the user's consent.

Critical Impact
Successful exploitation allows attackers to modify WooCommerce pricing plugin settings by abusing an authenticated administrator's session, requiring only user interaction with a malicious link or page.

Affected Products

algol.plus Advanced Dynamic Pricing for WooCommerce plugin
Plugin slug: advanced-dynamic-pricing-for-woocommerce
All versions from n/a through 4.9.3

Discovery Timeline

2025-04-17 - CVE-2025-39453 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-39453

Vulnerability Analysis

The vulnerability stems from missing or improperly implemented anti-CSRF protections on state-changing endpoints within the Advanced Dynamic Pricing for WooCommerce plugin. State-changing actions such as settings updates do not validate a unique per-request token tied to the user's session. As a result, any authenticated administrator visiting an attacker-controlled page can unknowingly submit forged requests to the target WordPress instance.

The attack requires user interaction, and impact is limited to integrity of plugin configuration. Confidentiality and availability are not directly impacted. However, altered pricing rules can affect store revenue, transaction integrity, and downstream business logic in WooCommerce workflows.

Root Cause

The root cause is the absence of a validated CSRF token, referred to as a nonce in WordPress, on sensitive administrative actions. WordPress provides wp_nonce_field() and check_admin_referer() primitives specifically to prevent this class of vulnerability. Missing verification on request handlers permits cross-origin form submissions to succeed when accompanied by the administrator's authentication cookie.

Attack Vector

The attack requires an authenticated administrator to visit a page controlled by the attacker while logged into WordPress. The malicious page issues a crafted POST request to a vulnerable plugin endpoint using an auto-submitting form or fetch() request. Because the browser attaches the session cookie automatically, the server processes the request as legitimate. The attacker has no direct access to the session token but successfully triggers an administrative settings change.

For technical write-up details, refer to the Patchstack WordPress Plugin Advisory.

Detection Methods for CVE-2025-39453

Indicators of Compromise

Unexpected changes to Advanced Dynamic Pricing for WooCommerce plugin configuration or pricing rules with no corresponding admin audit trail.
Web server access logs showing POST requests to plugin admin endpoints originating from external Referer headers.
Administrator sessions issuing settings-change requests immediately after visiting untrusted external sites.

Detection Strategies

Compare plugin configuration snapshots over time to identify unauthorized modification of pricing rules or discount conditions.
Alert on WordPress admin POST requests where the Referer header does not match the site's own origin.
Review WordPress activity logs for settings updates performed outside of normal administrator working hours or workflows.

Monitoring Recommendations

Enable and centralize WordPress audit logging with a plugin that records administrator actions and configuration changes.
Forward WooCommerce and WordPress logs to a SIEM for correlation with browser telemetry and network activity.
Monitor for phishing campaigns targeting site administrators, which are a common precursor to CSRF exploitation.

How to Mitigate CVE-2025-39453

Immediate Actions Required

Update the Advanced Dynamic Pricing for WooCommerce plugin to a version newer than 4.9.3 once a patched release is available from algol.plus.
Audit current plugin configuration for unauthorized changes to pricing rules, discounts, and settings.
Require administrators to log out of WordPress sessions when not actively managing the site.

Patch Information

At the time of publication, the vulnerability affects all versions up to and including 4.9.3. Consult the Patchstack WordPress Plugin Advisory for the latest fixed version guidance from the vendor.

Workarounds

Deploy a web application firewall (WAF) rule that blocks POST requests to WordPress admin endpoints when the Referer header does not match the site origin.
Restrict access to the WordPress admin interface by IP allowlisting where operationally feasible.
Enforce SameSite=Lax or Strict cookie attributes on WordPress authentication cookies to reduce cross-origin request risk.
Train administrators to avoid clicking untrusted links while authenticated to the WordPress admin panel.

bash

# Example nginx rule to block cross-origin POST to wp-admin
location ~* ^/wp-admin/ {
    if ($request_method = POST) {
        set $csrf_check "";
        if ($http_referer !~* "^https?://your-site\.example/") {
            set $csrf_check "block";
        }
        if ($csrf_check = "block") {
            return 403;
        }
    }
}