EUVD-2026-21264
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Lifecycle Timeline
3Description
The Customer Reviews for WooCommerce plugin for WordPress is vulnerable to authentication bypass in all versions up to, and including, 5.103.0. This is due to the `create_review_permissions_check()` function comparing the user-supplied `key` parameter against the order's `ivole_secret_key` meta value using strict equality (`===`), without verifying that the stored key is non-empty. For orders where no review reminder email has been sent, the `ivole_secret_key` meta is not set, causing `get_meta()` to return an empty string. An attacker can supply `key: ""` to match this empty value and bypass the permission check. This makes it possible for unauthenticated attackers to submit, modify, and inject product reviews on any product - including products not associated with the referenced order - via the REST API endpoint `POST /ivole/v1/review`. Reviews are auto-approved by default since `ivole_enable_moderation` defaults to `"no"`.
Analysis
Unauthenticated attackers can bypass authentication in Customer Reviews for WooCommerce plugin versions up to 5.103.0 by submitting an empty string as the review permission key, allowing them to create, modify, and inject malicious product reviews via the REST API without any legitimate order association. The vulnerability exploits improper key validation using strict equality comparison without checking for empty values, combined with auto-approval of reviews by default, enabling widespread review injection across all products on affected WooCommerce installations.
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