CVE-2025-15512: WordPress Aplazo Auth Bypass Vulnerability

CVE-2025-15512 Overview

The Aplazo Payment Gateway plugin for WordPress contains a missing authorization vulnerability [CWE-862] in the check_success_response() function. The flaw affects all plugin versions up to and including 1.4.3. Unauthenticated attackers can invoke this function to set arbitrary WooCommerce orders to pending payment status without supplying valid credentials. The root cause is the absence of a capability check on a publicly reachable handler within class-aplazo-module.php. Successful exploitation does not disclose data or break the site, but it lets remote actors tamper with order workflow state. Site operators relying on order status to trigger fulfillment, accounting, or notification logic are directly impacted.

Critical Impact
Unauthenticated remote attackers can modify the status of any WooCommerce order to pending payment, disrupting checkout, fulfillment, and reconciliation workflows on affected stores.

Affected Products

Aplazo Payment Gateway plugin for WordPress, all versions up to and including 1.4.3
WooCommerce stores using the affected plugin to process Aplazo transactions
WordPress sites exposing the plugin's AJAX or REST handler over the public network

Discovery Timeline

2026-01-14 - CVE-2025-15512 published to the National Vulnerability Database (NVD)
2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-15512

Vulnerability Analysis

The Aplazo Payment Gateway plugin registers check_success_response() as a request handler intended to process payment confirmation callbacks from the Aplazo service. The function updates the related WooCommerce order to pending payment status when invoked. Through version 1.4.3, this handler lacks both a capability check and a verified shared-secret validation step that would bind the request to a legitimate gateway callback.

Because the endpoint is reachable without authentication, any remote client can call it and supply an order identifier. The plugin then performs the status transition without confirming the caller's identity or authority. This is a business logic exposure tied to broken access control rather than a memory safety or injection issue.

The attack vector is network-based with low complexity and no user interaction required. Confidentiality and availability are not directly affected, but order integrity is degraded.

Root Cause

The root cause is a missing authorization check on check_success_response() in includes/module/class-aplazo-module.php. The function trusts request input and does not verify that the caller is the Aplazo payment provider or a privileged WordPress user. WordPress capability primitives such as current_user_can() and nonce verification via check_ajax_referer() are not enforced before the order status is mutated.

Attack Vector

An unauthenticated attacker sends a crafted HTTP request to the plugin's success-response endpoint, supplying a target order identifier. The plugin processes the request and transitions the referenced WooCommerce order to pending payment. Repeated requests can be scripted to manipulate many orders, disrupting downstream fulfillment, customer notifications, and reconciliation tasks. No verified public proof-of-concept is currently listed for this CVE.

No verified exploit code is available for this advisory. See the Wordfence Vulnerability Report and the WordPress Plugin Code Version reference for technical details on the vulnerable handler.

Detection Methods for CVE-2025-15512

Indicators of Compromise

WooCommerce orders transitioning to pending payment without a corresponding customer checkout event in access logs.
HTTP requests to the Aplazo Payment Gateway plugin endpoint from IP addresses outside the documented Aplazo provider ranges.
Bursts of requests that iterate sequential order_id values against the plugin's callback URL.

Detection Strategies

Correlate WooCommerce order status changes with authenticated admin sessions and gateway callback source IPs to flag anomalies.
Inspect web server access logs for unauthenticated requests targeting the Aplazo plugin's success-response handler and alert on unusual volume.
Compare the installed plugin version against the patched release and treat any version up to and including 1.4.3 as exposed.

Monitoring Recommendations

Enable detailed audit logging for WooCommerce order state transitions, including the requesting IP and user context.
Forward WordPress and web server logs to a centralized analytics platform and alert on repeated pending payment resets.
Monitor for spikes in pending payment orders relative to baseline checkout volume on an hourly basis.

How to Mitigate CVE-2025-15512

Immediate Actions Required

Update the Aplazo Payment Gateway plugin to a version newer than 1.4.3 as soon as the vendor publishes a fix.
Restrict access to the plugin's callback URL at the web application firewall (WAF) to known Aplazo source IP ranges.
Audit recent WooCommerce orders for unexpected transitions to pending payment and validate them against gateway records.

Patch Information

Review the WordPress Plugin Changeset for the upstream code change addressing this issue. The fix introduces an authorization check so that check_success_response() no longer trusts unauthenticated callers. Site operators should upgrade to the latest fixed release referenced in the Wordfence Vulnerability Report.

Workarounds

Temporarily disable the Aplazo Payment Gateway plugin if Aplazo is not actively used as a payment method.
Add WAF rules that block unauthenticated requests to the plugin's callback endpoint from non-Aplazo IP ranges.
Require an additional reverse-proxy header or token for requests reaching the callback URL until the patched version is deployed.

bash

# Example WAF rule pattern (adapt to your platform) to restrict the plugin callback
# Block requests to the Aplazo callback endpoint that do not originate from approved IPs
location ~* /wp-content/plugins/aplazo-payment-gateway/ {
    allow 203.0.113.0/24;   # replace with documented Aplazo source ranges
    deny  all;
}