Klarna Checkout for WooCommerce <= 2.0.9 - Arbitrary Plugin Installation, Activation and Deactivation
Strategic Overview
- Status
- Patched in 2.0.10
- Affected Plugin
- Kustom Checkout for WooCommerce
- Affected Version
< 2.0.10- CVSS
- 5.4Medium
- Weakness type
- CWE-862 · Missing Authorization
- CVE
CVE pending
At a glance
This record tracks a medium-severity Missing Authorization vulnerability in the Kustom Checkout for WooCommerce WordPress plugin, affecting versions < 2.0.10. It carries a CVSS score of 5.4 (reachable over the network; low attack complexity). The issue is fixed in version 2.0.10; sites on affected versions should update now. Disclosed April 2020.
Vulnerability Overview
The Klarna Checkout for WooCommerce plugin for WordPress is vulnerable to Arbitrary Plugin Installation, Activation and Deactivation in versions up to, and including, 2.0.9. This is due to a missing capability check on an an important AJAX function. This makes it possible for authenticated attackers to install, activate and deactivate any plugin on the affected site.
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 Kustom Checkout for WooCommerce < 2.0.10 takes a caller who can reach the endpoint. 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 Kustom Checkout for WooCommerce the fix is 2.0.10: builds < 2.0.10 are affected, anything from 2.0.10 onward is not.
Remediation
Update to version 2.0.10, 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: Kustom Checkout for WooCommerce 2.0.10 closes this, and updating the plugin is the step that ends it.
- Login Security
- Alerts
External References
Related records
Other vulnerabilities in Kustom Checkout for WooCommerce
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