CVE-2026-8865
Received Received - Intake
Stored XSS in Avalon23 Products Filter for WooCommerce Plugin

Publication date: 2026-06-24

Last updated on: 2026-06-24

Assigner: Wordfence

Description
The Avalon23 Products Filter for WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'avalon23_qr' shortcode in all versions up to, and including, 1.1.6. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes (notably 'title' and 'fixed_link') which are concatenated directly into single-quoted HTML attributes by the AVALON23_HELPER::draw_html_item() helper without esc_attr() or any other encoding. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
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Meta Information
Published
2026-06-24
Last Modified
2026-06-24
Generated
2026-06-24
AI Q&A
2026-06-24
EPSS Evaluated
N/A
NVD
CVE-2026-8865
EUVD
EUVD-2026-38683
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
avalon23 products_filter to 1.1.6 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Executive Summary

The Avalon23 Products Filter for WooCommerce plugin for WordPress has a Stored Cross-Site Scripting (XSS) vulnerability in all versions up to and including 1.1.6. This vulnerability arises because user-supplied shortcode attributes, specifically 'title' and 'fixed_link', are not properly sanitized or escaped before being inserted into HTML attributes. An attacker with Contributor-level access or higher can inject malicious scripts that will execute whenever a user views the affected page.

Impact Analysis

This vulnerability allows an authenticated attacker with Contributor-level access or above to inject arbitrary web scripts into pages. These scripts execute in the context of users who visit the injected pages, potentially leading to theft of sensitive information, session hijacking, or other malicious actions. The CVSS score indicates a moderate severity with impacts on confidentiality and integrity but no impact on availability.

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