Vulnerability · Published Jun 24, 2026 · Assigned by Wordfence
CVE-2026-8865Avalon23 Products Filter for WooCommerce <= 1.1.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes
Medium 6.4
In plain English
A medium-severity cross-site scripting in Avalon23 Products Filter for WooCommerce from paradigmatools. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| paradigmatools | Avalon23 Products Filter for WooCommerce | 0 – through 1.1.6 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/da9089a2-420f-4744-96d1-46c050a95328?source=cve
- https://plugins.trac.wordpress.org/browser/avalon23-products-filter-for-woocommerce/trunk/ext/qr_generator/index.php#L113
- https://plugins.trac.wordpress.org/browser/avalon23-products-filter-for-woocommerce/trunk/ext/qr_generator/index.php#L96
- https://plugins.trac.wordpress.org/browser/avalon23-products-filter-for-woocommerce/trunk/classes/helper.php#L17