CVE-2026-88828: Blacklist Manager for WooCommerce 1.3.0 - 2.3.1 - Blocked User Restriction Bypass via XML-RPC and Application Passwords
The Blacklist Manager for WooCommerce WordPress plugin from 1.3.0 to 2.3.1 does not enforce its user blocking on every authentication path, allowing the holder of an account the site owner has blocked to keep authenticating with that account's privileges, without the block being enforced or recorded.
Affected Software
Event History
Frequently Asked Questions
What access does an attacker need to exploit this issue?
The attacker needs credentials for an account that the site owner has already blocked. They can then authenticate through an affected authentication path and retain that account's existing privileges.
Which authentication methods are affected?
The blocking restriction is bypassable through XML-RPC and Application Passwords. The plugin does not enforce or record the block on these authentication paths.
Which plugin versions should be investigated?
Blacklist Manager for WooCommerce versions 1.3.0 through 2.3.1 are affected. Sites using a version in this range should review whether blocked accounts may still have XML-RPC or Application Password access.