Blacklist Manager for WooCommerce 1.3.0 - 2.3.1 - Blocked User Restriction Bypass
Strategic Overview
- Status
- Patched in 2.3.2
- Affected Version
1.3.0 – 2.3.1- CVSS
- 4.3Medium
- Weakness type
- CWE-693 · Protection Mechanism Failure
- CVE
CVE-2026-88828
At a glance
CVE-2026-88828 is a medium-severity Protection Mechanism Failure vulnerability in the Blacklist Manager WordPress plugin, affecting versions 1.3.0 – 2.3.1. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). The issue is fixed in version 2.3.2; sites on affected versions should update now. Disclosed September 2026, reported by Naoki Kawahigashi.
Vulnerability Overview
The Blacklist Manager – WooCommerce Anti-Fraud, Blacklist & Checkout Verification plugin for WordPress is vulnerable to blocked user bypass in versions 1.3.0 to 2.3.1. This makes it possible for authenticated attackers, with Custom-level access and above, to continue to access their account even when they have been blocked.
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-693: Protection Mechanism Failure
The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.
Remediation
Update to version 2.3.2, or a newer patched version
How does WordSec protect against this?
The fix is the thing that ends this: Blacklist Manager 2.3.2 closes this, and updating the plugin is the step that ends it.
- Alerts
External References
Related records
Other vulnerabilities in Blacklist Manager – WooCommerce Anti-Fraud, Blacklist & Checkout Verification
Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C