CVE-2026-32576 in Faktur Pro for WooCommerce Plugin
Summary
by MITRE • 10/06/2026
Customer Insecure Direct Object References (IDOR) in Faktur Pro for WooCommerce <= 3.2.1 versions.
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Analysis
by VulDB Data Team • 10/06/2026
The vulnerability identified as an insecure direct object reference within the Faktur Pro plugin for WordPress, specifically affecting versions up to and including 3.2.1, represents a critical flaw in access control logic that allows unauthorized users to manipulate customer data directly through manipulated identifiers. This type of weakness is formally categorized under CWE-639, which describes situations where an application relies on user-supplied input to identify a specific object or resource without performing adequate authorization checks. In the context of this plugin, the flaw typically manifests when processing requests related to invoice generation, customer profile updates, or order management features that require passing internal identifiers such as post IDs, database primary keys, or session tokens directly from the client side to the server-side logic.
From a technical perspective, the root cause lies in the failure of the application to verify whether the authenticated user has permission to access or modify the specific resource identified by the provided object reference. Instead of mapping external identifiers to internal permissions or validating ownership against the current session's context, the code blindly trusts the input parameter. This allows an attacker who is logged into a legitimate WordPress account with low-level privileges, such as a subscriber or customer role, to alter parameters in HTTP requests—such as changing a numeric ID from one value to another—to access data belonging to other customers or administrators. The vulnerability exploits the assumption that object identifiers are opaque and non-guessable, whereas they often follow predictable patterns like sequential integers, making them trivially enumerable by an attacker using automated tools or manual manipulation via browser developer consoles or proxy interceptors like Burp Suite.
The operational impact of this vulnerability is severe due to its potential for widespread data exposure within the e-commerce ecosystem facilitated by WooCommerce. An exploited instance can lead to a complete compromise of customer confidentiality, including access to personally identifiable information such as names, email addresses, physical shipping and billing addresses, and potentially payment details if stored in accessible metadata fields associated with invoices or orders. Beyond privacy violations, this flaw undermines data integrity as attackers may modify order statuses, alter invoice amounts, or delete critical transaction records for their own benefit or malicious intent. For businesses relying on WooCommerce for revenue generation, such a breach can result in significant financial loss, regulatory penalties under frameworks like GDPR due to the exposure of personal data, and irreversible damage to brand reputation and customer trust.
This vulnerability aligns closely with MITRE ATT&CK technique T1078, which covers Valid Accounts, as it often requires initial authentication but leverages insufficient authorization checks rather than credential theft. It also relates to T1530, Data from Cloud Storage Object Buckets, in the broader sense of accessing unauthorized data objects within a web application environment. To mitigate this risk, immediate action is required by updating Faktur Pro for WooCommerce to version 3.2.2 or later where these access control checks have been implemented correctly. Administrators should ensure that all object references are validated against the current user's permissions and ownership records before processing any state-changing requests. Furthermore, implementing a robust security policy that includes regular penetration testing focused on broken access controls, along with the deployment of Web Application Firewalls configured to detect anomalous ID enumeration patterns, can provide additional layers of defense against exploitation attempts until patches are fully deployed across all affected installations.