CVE-2021-34646criticalCWE-290

CVE-2021-34646: critical vulnerability in Pluggabl LLC Booster for WooCommcerce

Booster for WooCommerce <= 5.4.3 Authentication Bypass

Published · Updated

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60Vexday Risk Score

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ssvc Attendcvss 9.8epss 51%
from disclosure to weapon5 days
Published on NVDAug 30
1st PoC+5d
In short

The Booster for WooCommerce plugin generates weak verification tokens that attackers can guess, allowing them to impersonate any user—including admins—and log in without knowing passwords. This is a critical flaw if the Email Verification module is enabled, which it is by default.

Technical detail

The plugin's reset_and_mail_activation_link function in class-wcj-emails-verification.php uses weak random token generation for email verification. Attackers can predict or brute-force tokens to trigger verification for arbitrary accounts (including administrators) and, with the 'Login User After Verification' setting enabled by default, achieve unauthenticated account takeover and unauthorized administrative access.

Summary generated and translated by AI from the official description.
Versions up to, and including, 5.4.3, of the Booster for WooCommerce WordPress plugin are vulnerable to authentication bypass via the process_email_verification function due to a random token generation weakness in the reset_and_mail_activation_link function found in the ~/includes/class-wcj-emails-verification.php file. This allows attackers to impersonate users and trigger an email address verification for arbitrary accounts, including administrative accounts, and automatically be logged in as that user, including any site administrators. This requires the Email Verification module to be active in the plugin and the Login User After Successful Verification setting to be enabled, which it is by default.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Pluggabl LLC · Booster for WooCommcerce
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