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FluentCart <= 1.6.4 — Unauthenticated Unauthorized Customer Account Access

CVE-2026-100143Published · Updated

Action summary

Affected: ≤1.6.4Update to 1.6.5 or newer

All remediation steps
Watch plugin
Severity
High7.3
CVSS
7.3
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:N User interaction
None
S:U Scope
Unchanged
C:L Confidentiality
Low
I:L Integrity
Low
A:L Availability
Low
Weakness
CWE-287 Improper Authentication
Required access
No account needed
Exploit prediction (EPSS)
0.2% chance in 30 days10th percentile
CISA KEV
Not listed
On this page8

Am I affected?

FluentCart – Online Store Builder & eCommerce Checkout fluent-cart

  1. Affected≤ 1.6.4
  2. Patched in1.6.5

Update to 1.6.5 or newer.

You are affected if you run ≤ 1.6.4. Version 1.6.5 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under FluentCart – Online Store Builder & eCommerce Checkout.
  • No admin access? Run a passive check of your site. It reads public files only.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to version 1.6.5, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch FluentCart – Online Store Builder & eCommerce Checkout to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Mutantgun.

The FluentCart plugin for WordPress is vulnerable to Account Takeover in all versions up to, and including, 1.6.4. This is due to automatic linking of a customer record to a WordPress user account by matching the attacker-supplied billing email against get_user_by('email') during checkout, without verifying the requester controls that address. This makes it possible for unauthenticated attackers to obtain access to an existing customer account and its stored purchase history by supplying that customer's email address during a guest checkout.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in FluentCart – Online Store Builder & eCommerce Checkout

All 10
More vulnerabilities in FluentCart – Online Store Builder & eCommerce Checkout
SeverityVulnerabilityCVEPublished
Medium5.3Unauthenticated Insecure Direct Object Reference
≤2.1.0Update to 2.2.0
CVE-2026-100142
High7.5Insecure Direct Object Reference to Unauthenticated Sensitive Information Disclosure via 'order_id' and 'billing_address_id' Parameters
≤1.7.0Update to 1.7.1
CVE-2026-103525
Medium4.9Authenticated (Administrator+) SQL Injection via 'products.variants' Array Keys
≤1.7.0Update to 1.7.1
CVE-2026-103518
Medium5.3Unauthenticated Information Exposure
≤1.7.1Update to 1.8.0
CVE-2026-109695
High8.1Authenticated (Custom+) Arbitrary File Deletion via 'file_path' Parameter
≤1.6.2Update to 1.6.3
CVE-2026-120577

Timeline

  1. CVE published

    Severity high, CVSS 7.3

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
CVE® identifiers
Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
EPSS
Exploit Prediction Scoring System by FIRST.org.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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