CVE-2026-4664 Auth bypass in Customer Reviews for WooCommerce
Unauthenticated attackers can bypass authentication to submit arbitrary product reviews by exploiting an empty secret key check in the WooCommerce plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4664?
CVE-2026-4664 is a medium-severity authentication bypass vulnerability in ivole Customer Reviews for WooCommerce, published on 10 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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"`.
Weakness: CWE-287
Which versions are affected by CVE-2026-4664?
How do I fix CVE-2026-4664?
No fix has been published for CVE-2026-4664 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-4664 being exploited?
There is no known exploitation of CVE-2026-4664 in the wild and no public exploit code.
Sources
Also known as GHSA-jhv8-553j-r4x3.