CVE-2025-53203: WooCommerce PDF Invoice Builder CSRF Flaw

CVE-2025-53203 Overview

CVE-2025-53203 is a Cross-Site Request Forgery (CSRF) vulnerability [CWE-352] affecting the EDGARROJAS WooCommerce PDF Invoice Builder plugin (woo-pdf-invoice-builder) for WordPress. The flaw impacts all versions up to and including 1.2.148. An attacker can craft a malicious web page that, when visited by an authenticated site administrator, submits forged requests to the vulnerable plugin. Because the plugin fails to properly validate request origin, these requests execute in the context of the authenticated user. Exploitation requires user interaction, typically through phishing or social engineering to lure the target to attacker-controlled content.

Critical Impact
Attackers can trigger unauthorized state-changing actions in the WooCommerce PDF Invoice Builder plugin by tricking authenticated administrators into visiting a malicious page, resulting in limited integrity impact on affected WordPress sites.

Affected Products

EDGARROJAS WooCommerce PDF Invoice Builder (woo-pdf-invoice-builder) — all versions through 1.2.148
WordPress sites running WooCommerce with the vulnerable plugin installed
Deployments where administrators can be socially engineered into visiting external content

Discovery Timeline

2025-06-27 - CVE-2025-53203 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-53203

Vulnerability Analysis

The vulnerability stems from missing or inadequate CSRF protection in the WooCommerce PDF Invoice Builder plugin. WordPress provides nonce-based anti-CSRF tokens through wp_nonce_field() and check_admin_referer(), but the affected plugin does not enforce these checks on one or more state-changing endpoints. An unauthenticated remote attacker crafts an HTML page containing a hidden form or JavaScript that submits a request to the target WordPress site. When an authenticated administrator visits the attacker-controlled page, the browser automatically includes valid session cookies with the forged request. The plugin processes the request as legitimate, performing whatever administrative action the attacker specified.

Root Cause

The root cause is failure to validate request authenticity through anti-CSRF nonce tokens on privileged actions within woo-pdf-invoice-builder. The plugin trusts session cookies alone as proof of intent, violating defense-in-depth expectations for WordPress administrative endpoints.

Attack Vector

Exploitation occurs over the network and requires user interaction. The attacker must convince an authenticated administrator to visit a malicious URL or open a crafted email while logged into WordPress. No privileges are required from the attacker directly — the forged request inherits the victim's session authority. The impact is limited to integrity, with no direct confidentiality or availability consequences per the CVSS vector.

See the Patchstack Security Vulnerability Report for technical details on the specific endpoints affected.

Detection Methods for CVE-2025-53203

Indicators of Compromise

Unexpected changes to WooCommerce PDF Invoice Builder plugin settings or invoice templates without corresponding administrator activity in audit logs
HTTP POST requests to woo-pdf-invoice-builder admin endpoints with Referer headers pointing to external, untrusted domains
Administrator sessions performing plugin-related actions immediately after visiting external links from email or chat clients

Detection Strategies

Enable WordPress activity logging plugins to capture all administrative actions and correlate them with expected user workflows
Inspect web server access logs for state-changing requests to plugin endpoints that lack referrer headers from the same origin
Deploy a web application firewall (WAF) with rules that flag missing or invalid WordPress nonce parameters on plugin admin routes

Monitoring Recommendations

Monitor for anomalous administrator behavior patterns, particularly configuration changes outside normal maintenance windows
Alert on new or modified invoice template files on disk that do not correspond to authorized deployments
Track outbound clicks from administrator email accounts and correlate with subsequent WordPress admin activity

How to Mitigate CVE-2025-53203

Immediate Actions Required

Update the WooCommerce PDF Invoice Builder plugin to a version later than 1.2.148 once the vendor publishes a patched release
Restrict WordPress administrator accounts to dedicated browsers or browser profiles not used for general web browsing or email
Enforce multi-factor authentication on all administrator accounts to reduce broader account compromise risk
Review recent plugin configuration changes and invoice templates for unauthorized modifications

Patch Information

At the time of publication, the vulnerability affects all versions of woo-pdf-invoice-builder from n/a through 1.2.148. Administrators should consult the Patchstack Security Vulnerability Report for current patch status and vendor updates.

Workarounds

Deactivate the WooCommerce PDF Invoice Builder plugin until a patched version is available if invoice generation is not business-critical
Deploy a WAF rule that requires a valid WordPress nonce parameter (_wpnonce) on all POST requests to plugin admin endpoints
Configure SameSite=Strict or SameSite=Lax cookie attributes for WordPress session cookies to limit cross-site request delivery
Train administrators to log out of WordPress before browsing external links and to use isolated browser sessions for admin tasks

bash

# Example WAF rule concept (ModSecurity) to require WordPress nonce on plugin endpoints
SecRule REQUEST_URI "@contains /wp-admin/admin.php" \
  "chain,deny,status:403,id:1005301,msg:'Missing WP nonce on woo-pdf-invoice-builder request'"
  SecRule ARGS:page "@rx woo-pdf-invoice-builder" \
    "chain"
    SecRule &ARGS:_wpnonce "@eq 0"