Customer Email Verification for WooCommerce <= 2.8.2 - Unauthenticated Authentication Bypass via Predictable Email-Verification Token to 'cusomer_email_verify' Parameter

Customer Email Verification for WooCommerce · Improper authentication · CWE-287

AffectedCustomer Email Verification for WooCommerce

FixNo fix listed yet.

PublishedOct 28, 05:33 · Wordfence

ScoredOct 28 · 4.8 · Wordfence

Exploit code publicNone known · checked 21:18 UTC

ExploitedNone known · CISA KEV checked 22:08 UTC

What we know

No known exploitation. CISA KEV, checked 22:08 UTC.

No public exploit code known. Exploit-DB, Metasploit, Nuclei, checked 21:18 UTC.

An attacker only needs network access to the target. No login needed. CVSS: network, no privileges.

It only works under certain conditions, which makes it harder to pull off. CVSS: high attack complexity.

Description

The Customer Email Verification for WooCommerce plugin for WordPress is vulnerable to Authentication Bypass via a Predictable Email-Verification Token in all versions up to, and including, 2.8.2. This is due to the `authenticate_user_by_email_link()` function — hooked on the `wp` action and triggered by the `cusomer_email_verify` GET parameter — lacking any capability check or nonce verification, while the `secret_code` it validates is generated as `md5(email . time())` and the `verify_otp_nonce` required to trigger token issuance via the `wp_ajax_nopriv_resend_otp` handler is emitted to every front-end visitor through `wp_localize_script`. This makes it possible for unauthenticated attackers to log in as a newly created, verified WooCommerce customer bound to an arbitrary email address — or to flip an existing account's `customer_email_verified` meta to verified — fully bypassing the plugin's core email-verification control. Exploitation requires the `cev_user_log` table to contain a `password` column, which is absent from the fresh-install schema shipped in version 2.8.2 but is present on sites upgraded from an older version where that column was defined.

From Wordfence

Affected and fixed versions

ProductAffectedFixed inCustomer Email Verification for WooCommerceup to 2.8.2–

Exploit code

Exploit-DBnone knownMetasploitnone knownNucleinone known

References