WC Buckaroo BPE Gateway <= 4.8.0 - Missing Authorization to Authenticated (Subscriber+) Unauthorized Order Refund
Strategic Overview
- Status
- Patched in 4.9.0
- Affected Plugin
- Buckaroo Woocommerce Payments Plugin
- Affected Version
<= 4.8.0- CVSS
- 4.3Medium
- Weakness type
- CWE-862 · Missing Authorization
- CVE
CVE-2026-13329
At a glance
CVE-2026-13329 is a medium-severity Missing Authorization vulnerability in the Buckaroo Woocommerce Payments Plugin WordPress plugin, affecting versions <= 4.8.0. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 4.9.0; sites on affected versions should update now. Disclosed July 2026, reported by Vaibhav Narkhede.
Vulnerability Overview
The Buckaroo Woocommerce Payments Plugin plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on a function in all versions up to, and including, 4.8.0. This makes it possible for authenticated attackers, with Subscriber-level access and above, to issue order refunds.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.
CWE-862: Missing Authorization
Reaching this weakness in Buckaroo Woocommerce Payments Plugin <= 4.8.0 takes an account at Subscriber level or above. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.
Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For Buckaroo Woocommerce Payments Plugin the fix is 4.9.0: builds <= 4.8.0 are affected, anything from 4.9.0 onward is not.
Remediation
Update to version 4.9.0, or a newer patched version
How does WordSec protect against this?
Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Buckaroo Woocommerce Payments Plugin 4.9.0 closes this, and updating the plugin is the step that ends it.
- Login Security
- Alerts
External References
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