CVE-2026-67359 in J2Store Extension
Summary
by MITRE • 08/21/2026
Joomla Extension - j2commerce.com - Order content disclosure J2Store 1.0.0-3.3.20, 4.0.0-4.0.20, 4.1.0-4.1.5 - An unauthenticated visitor could supply any order_id as a query parameter to render the full checkout confirmation page for that order, including line items, prices, and totals.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 08/21/2026
The vulnerability identified in J2Store versions ranging from 1.0.0 through 3.3.20 and 4.0.0 through 4.1.5 represents a critical failure in access control mechanisms within the Joomla e-commerce extension ecosystem. This flaw allows an unauthenticated user to bypass standard authentication requirements by directly manipulating query parameters associated with order identifiers. Specifically, the application fails to validate whether the requesting entity possesses legitimate authorization for the specific order being accessed. By supplying arbitrary or sequential order_id values as input, attackers can retrieve sensitive checkout confirmation pages that contain detailed transactional data. This behavior indicates a fundamental lack of server-side verification regarding user-session binding and resource ownership during the retrieval process.
From a technical perspective, this issue is classified under CWE-284 Improper Access Control, which encompasses scenarios where an application does not properly restrict access to resources based on user identity or privileges. The vulnerability also aligns with CWE-639 Authorization Bypass Through User-Controlled Key, as the order identifier serves as a key that determines resource visibility without adequate secondary checks against the authenticated state of the requester. In many web applications, it is assumed that only logged-in users can view their own orders; however, J2Store’s implementation allows public access to these pages if the correct ID is known or guessed. This design oversight exposes internal business logic and customer data to any internet user capable of constructing valid HTTP requests with manipulated parameters.
The operational impact of this vulnerability extends beyond simple information disclosure. The exposed checkout confirmation page typically includes line items, unit prices, total amounts paid, shipping addresses, billing details, and potentially partial payment information such as the last four digits of credit card numbers or transaction reference codes. This data constitutes personally identifiable information protected under regulations like GDPR in Europe or CCPA in California. Unauthorized access to this data can lead to significant legal liabilities for site administrators who fail to protect customer privacy. Furthermore, attackers may use this information for social engineering attacks, phishing campaigns targeting specific customers with precise order details, or competitive intelligence gathering regarding product pricing and sales volumes.
In the context of cyber attack frameworks, this vulnerability facilitates actions described in MITRE ATT&CK technique T1078 Valid Accounts when combined with credential stuffing, but more directly it relates to data exfiltration via improper access controls. Attackers can automate the enumeration of order IDs using simple scripts to harvest large volumes of customer data efficiently. The lack of rate limiting or anomaly detection further exacerbates the risk, allowing for rapid scraping of sensitive records without triggering immediate security alerts. This passive reconnaissance phase is often a precursor to more aggressive attacks such as account takeover attempts where attackers use known personal details to reset passwords or bypass two-factor authentication challenges that rely on email verification linked to exposed addresses.
Mitigation strategies must address both the immediate technical flaw and broader architectural weaknesses. The primary remediation involves implementing strict server-side authorization checks for all order-related endpoints. Developers should ensure that any request to view an order requires a valid, active session associated with the user who placed the order. This can be achieved by verifying that the authenticated user’s ID matches the owner of the requested order_id before rendering the page content. Additionally, implementing indirect object references rather than direct exposure of sequential IDs can reduce predictability, although this alone is insufficient without proper access control validation.
Administrators should also consider deploying web application firewalls to detect and block patterns indicative of automated enumeration attacks targeting order parameters. Enforcing HTTPS ensures that any remaining sensitive data in transit remains encrypted, reducing the risk of interception by network-level attackers. Regular security audits focusing on authentication and authorization logic are essential to identify similar flaws across other modules within the Joomla platform. Updating J2Store to a patched version where this vulnerability has been resolved is the most effective immediate action for site owners relying on these specific versions. Until patches are applied, restricting public access to checkout confirmation pages via server configuration rules or requiring login before viewing any order-related content can serve as temporary compensating controls to protect customer data integrity and confidentiality.