CVE-2026-18442

WCFM Marketplace <= 3.8.2 - Unauthenticated SQL Injection via 'wcfmmp_user_location_lat' / 'wcfmmp_user_location_lng' Parameter

2026-09-17 18:48

Strategic Overview

Status: Patched in 3.8.3
Affected Plugin: WCFM Marketplace – Multivendor Marketplace for WooCommerce
Affected Version: <= 3.8.2
CVSS: 7.5High
Weakness type: CWE-89 · Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CVE: CVE-2026-18442

View all WCFM Marketplace – Multivendor Marketplace for WooCommerce vulnerabilities

At a glance

CVE-2026-18442 is a high-severity Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in the WCFM Marketplace WordPress plugin, affecting versions <= 3.8.2. It carries a CVSS score of 7.5 (reachable over the network; low attack complexity; high confidentiality impact). Exploitation requires no authentication. The issue is fixed in version 3.8.3; sites on affected versions should update now. Disclosed September 2026, reported by Jonah Burgess (CryptoCat).

Vulnerability Overview

The WCFM Marketplace – Multivendor Marketplace for WooCommerce plugin for WordPress is vulnerable to generic SQL Injection via the 'wcfmmp_user_location_lng' parameter in all versions up to, and including, 3.8.2 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on confidentiality.

CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

WCFM Marketplace <= 3.8.2 carries this weakness at wcfmmp_user_location_lng, and reaching it takes no account at all. SQL injection happens when request data is concatenated into a query instead of being bound as a parameter, letting an attacker change the structure of the statement rather than just its values.

A working injection can read any table the database user can see, which on a WordPress install means user records, password hashes and session or API secrets stored in options. For WCFM Marketplace the fix is 3.8.3: builds <= 3.8.2 are affected, anything from 3.8.3 onward is not.

Remediation

Update to version 3.8.3, or a newer patched version

How does WordSec protect against this?

Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: WCFM Marketplace 3.8.3 closes this, and updating the plugin is the step that ends it.

Firewall
Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-18442 https://www.wordfence.com/threat-intel/vulnerabilities/id/107f19b5-b67d-4242-b312-531c31b9a73c https://nvd.nist.gov/vuln/detail/CVE-2026-18442

Related records

Same weakness class

Other vulnerabilities in WCFM Marketplace – Multivendor Marketplace for WooCommerce

CVSS Vector

7.5

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone

This record contains material that is subject to copyright

CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

https://www.cve.org/Legal/TermsOfUse

Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.

https://www.wordfence.com/wordfence-intelligence-terms-and-conditions/