EUVD-2026-54881
GHSA-39g4-r8qh-2jjf
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Network-accessible with no auth required for order disclosure; integrity impact confirmed by unauthenticated cart manipulation; UI:N adopted pending vendor clarification of crafted-link mechanism.
Primary rating from Vendor (wpscan).
CVSS VectorVendor: wpscan
Lifecycle Timeline
5DescriptionCVE.org
The PiWeb Cancel order / Refund request for WooCommerce WordPress plugin before 1.3.4.34 does not have authorization or ownership checks when adding the contents of a previous order to the cart, allowing unauthenticated users to disclose the contents of other customers' orders, as well as to clear and repopulate a logged in user's cart via a crafted link.
AnalysisAI
Missing authorization and ownership checks in the PiWeb Cancel order / Refund request for WooCommerce WordPress plugin (versions before 1.3.4.34) expose two distinct attack surfaces: unauthenticated order content disclosure and unauthenticated cart manipulation against logged-in users. Any unauthenticated actor can query another customer's order contents by supplying an arbitrary order ID, and can clear and repopulate a logged-in user's cart via a crafted request, degrading shopping session integrity without any privilege. No public exploit has been identified at time of analysis, and the EPSS score of 0.18% (8th percentile) indicates low observed exploitation probability.
Technical ContextAI
The vulnerability stems from CWE-862 (Missing Authorization) - a class of flaw where a protected operation is executed without verifying whether the requesting principal has the right to perform it. In WooCommerce, orders are associated with customer accounts; any operation that loads a prior order and re-adds its items to the cart must verify that the requesting session owns that order. The PiWeb plugin exposes an endpoint (or URL-addressable action) that performs this re-add without an ownership or authentication gate. Because WooCommerce cart operations can be triggered server-side by crafted HTTP requests, the integrity impact extends to sessions belonging to other users. Affected versions span the entire release history prior to 1.3.4.34.
RemediationAI
Update the PiWeb Cancel order / Refund request for WooCommerce plugin to version 1.3.4.34 or later; the vendor-released patch for this specific version is confirmed by the EUVD advisory and WPScan report. Site administrators should apply this update immediately via the WordPress plugin dashboard. If an immediate upgrade is not feasible, a compensating control is to temporarily disable the plugin entirely to eliminate the exposed endpoint - this removes the cancel/refund-request functionality from the storefront but eliminates the attack surface. As a secondary measure, restrict unauthenticated access to WooCommerce REST API or AJAX endpoints at the web server or WAF layer, though this may affect other plugin functionality and requires careful testing. The vendor advisory is referenced at https://wpscan.com/vulnerability/544a35ce-c858-4718-ab43-6e945de6f278/.
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Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
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