CVE-2026-7804

Product Filter for WooCommerce by WBW <= 3.4.2 - Reflected Cross-Site Scripting via 'wpf_fid' Parameter

2026-09-08 14:38

Strategic Overview

Status: Patched in 3.4.3
Affected Plugin: Product Filter for WooCommerce by WBW
Affected Version: <= 3.4.2
CVSS: 6.1Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2026-7804

View all Product Filter for WooCommerce by WBW vulnerabilities

At a glance

CVE-2026-7804 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Product Filter for WooCommerce by WBW WordPress plugin, affecting versions <= 3.4.2. It carries a CVSS score of 6.1 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 3.4.3; sites on affected versions should update now. Disclosed September 2026, reported by Yuto Hyakumoto.

Vulnerability Overview

The Product Filter for WooCommerce by WBW plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'wpf_fid' parameter in all versions up to, and including, 3.4.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. Exploitation requires the crafted request to target a page where a filter using the vulnerable recalculation output is present.

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.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product Filter for WooCommerce by WBW <= 3.4.2 carries this weakness at wpf_fid, and reaching it takes a caller who can reach the endpoint. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Product Filter for WooCommerce by WBW the fix is 3.4.3: builds <= 3.4.2 are affected, anything from 3.4.3 onward is not.

Remediation

Update to version 3.4.3, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Product Filter for WooCommerce by WBW: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Product Filter for WooCommerce by WBW 3.4.3 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-7804 https://www.wordfence.com/threat-intel/vulnerabilities/id/28e45ffc-ea55-42a4-97ea-4638f640b712 https://nvd.nist.gov/vuln/detail/CVE-2026-7804

Related records

Other vulnerabilities in Product Filter for WooCommerce by WBW

CVSS Vector

6.1

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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