Is CVE-2026-4664 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2026-4664, but active exploitation has not been confirmed.

Can CVE-2026-4664 be exploited remotely?

Yes. CVE-2026-4664 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-4664?

CVE-2026-4664 has a CVSS score of 5.3 (MEDIUM).

HOME VULNERABILITIESCVE-2026-4664

MEDIUMPOC

CVE-2026-4664

CWE-287Published: April 10, 2026· Updated: Apr 13, 2026

5.3

CVSS v3.1

EPSS:0.15%probability of exploitation in 30 daysPercentile:35.1th

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"`.

NVD Source

Technical Analysis

CVE-2026-4664 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A proof-of-concept (PoC) exploit exists for CVE-2026-4664. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.