CVE-2025-22809: PDF Catalog WooCommerce XSS Vulnerability

CVE-2025-22809 Overview

CVE-2025-22809 is a DOM-based Cross-Site Scripting (XSS) vulnerability in the theme funda PDF Catalog Woocommerce plugin for WordPress. The flaw affects all versions of pdf-catalog-woocommerce up to and including version 2.0. Attackers exploit improper neutralization of user-supplied input during web page generation, allowing malicious script execution in a victim's browser. Successful exploitation requires authenticated low-privilege access and user interaction, and it can result in session theft, unauthorized actions, or redirection to attacker-controlled resources. The issue is tracked under CWE-79 and documented in the Patchstack XSS Vulnerability Advisory.

Critical Impact
Authenticated attackers can inject malicious JavaScript that executes in other users' browser sessions, enabling account takeover paths and content manipulation within the WordPress storefront.

Affected Products

theme funda PDF Catalog Woocommerce plugin (pdf-catalog-woocommerce)
All versions from initial release through 2.0
WordPress sites running WooCommerce with this plugin installed

Discovery Timeline

2025-01-09 - CVE-2025-22809 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-22809

Vulnerability Analysis

The vulnerability stems from unsafe handling of user-controlled input processed by client-side JavaScript within the PDF Catalog Woocommerce plugin. The plugin writes attacker-influenced values into the Document Object Model (DOM) without sanitization or output encoding. When the browser parses the injected content, it executes attacker-supplied script in the context of the WordPress site.

Because the injection occurs in the DOM, the malicious payload does not need to traverse the server response body. Client-side sinks such as innerHTML, document.write, or unescaped template rendering are typical vectors for this class of flaw. The scope change indicated in the CVSS vector reflects impact beyond the vulnerable plugin, affecting the broader browser session context.

Root Cause

The root cause is failure to apply output encoding or input validation before rendering user-supplied data in the browser. This maps to CWE-79: Improper Neutralization of Input During Web Page Generation. The plugin trusts input that flows into DOM manipulation functions, allowing HTML and JavaScript to be interpreted rather than displayed as text.

Attack Vector

An attacker with at least low-privilege authenticated access crafts a request or link containing a JavaScript payload targeting a vulnerable plugin parameter. The attacker delivers the link to a privileged user, typically through phishing or a forum post. When the victim opens the link, the plugin's client-side code writes the payload into the DOM and the browser executes it. Consult the Patchstack advisory for parameter-specific details.

Detection Methods for CVE-2025-22809

Indicators of Compromise

Web server or WAF logs containing URL parameters with <script>, javascript:, onerror=, or encoded variants directed at PDF Catalog endpoints.
Unexpected outbound requests from administrator browser sessions to attacker-controlled domains shortly after interacting with catalog pages.
New or modified WordPress administrator accounts created without a corresponding audit trail.

Detection Strategies

Inventory WordPress installations to identify sites running pdf-catalog-woocommerce at version 2.0 or earlier.
Deploy a Web Application Firewall (WAF) with signatures for reflected and DOM-based XSS payloads targeting plugin query parameters.
Enable Content Security Policy (CSP) reporting to capture script execution violations that indicate injection attempts.

Monitoring Recommendations

Alert on WordPress admin sessions performing high-privilege actions immediately after loading catalog URLs with anomalous query strings.
Monitor plugin file integrity and installed version data across WordPress fleets using centralized logging.
Correlate authentication logs with browser telemetry to identify session hijacking following user interaction with crafted links.

How to Mitigate CVE-2025-22809

Immediate Actions Required

Identify and inventory all WordPress sites running PDF Catalog Woocommerce version 2.0 or earlier.
Deactivate the plugin on affected sites until a patched release is confirmed available.
Rotate WordPress administrator credentials and invalidate active sessions if suspicious activity is observed.
Educate privileged users to avoid clicking unsolicited links referencing catalog URLs.

Patch Information

At the time of publication, the Patchstack advisory lists versions through 2.0 as vulnerable and does not identify a fixed release. Administrators should monitor the vendor's plugin page and the Patchstack database for the availability of a patched version.

Workarounds

Remove or replace the pdf-catalog-woocommerce plugin with a maintained alternative until a fix is released.
Enforce a strict Content Security Policy that blocks inline scripts and restricts script sources to trusted origins.
Restrict access to WordPress administrative interfaces using IP allowlisting or authenticated VPN gateways.
Configure a WAF rule set to block requests containing common XSS payload patterns aimed at plugin endpoints.

bash

# Example WAF rule (ModSecurity) to block reflected XSS payloads targeting the plugin
SecRule REQUEST_URI "@contains /wp-content/plugins/pdf-catalog-woocommerce/" \
  "chain,id:1002209,phase:2,deny,status:403,msg:'Blocked potential XSS on pdf-catalog-woocommerce'"
  SecRule ARGS "@rx (?i)(<script|javascript:|onerror=|onload=)" "t:none,t:urlDecodeUni"