CVE-2026-4664Network attack vector

Unauthenticated review tampering via empty secret key

Published Apr 10, 2026 · Updated Apr 10, 2026

Improper authentication in Customer Reviews for WooCommerce 5.103.0 and earlier allows remote attackers to alter reviews via its REST API. The create_review_permissions_check function strictly compares the supplied key with ivole_secret_key but accepts empty strings when order metadata is unset. An unauthenticated request can therefore create or modify reviews for unrelated products, and the default moderation setting publishes them automatically.

CVSS severity5.3
Medium
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Customer Reviews for WooCommerce 5.103.0 and earlier allows remote attackers to alter reviews via its REST API. The create_review_permissions_check function strictly compares the supplied key with ivole_secret_key but accepts empty strings when order metadata is unset. An unauthenticated request can therefore create or modify reviews for unrelated products, and the default moderation setting publishes them automatically.

The record

CVE
CVE-2026-4664
Published
Apr 10, 2026
Updated
Apr 10, 2026
Vendor
CusRev
Product
Customer Reviews for WooCommerce
Classifications
CWE-287
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=5.103.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CusRev · Customer Reviews for WooCommerceversion=0 <=5.103.0

Published CVSS scores

5.3WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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