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CVE-2026-8865— Avalon23 Products Filter for WooCommerce <= 1.1.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes

Quick assessment

Affected
paradigmatools Avalon23 Products Filter for WooCommerce
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

paradigmatools Avalon23 Products Filter for WooCommerce是paradigmatools组织的一款WooCommerce产品筛选过滤插件。 paradigmatools Avalon23 Products Filter for WooCommerce 1.1.6及之前版本存在跨站脚本漏洞，该漏洞源于对用户提供的短代码属性清理和转义不足，可能导致存储型跨站脚本攻击。

CVSS 6.4 · Medium EPSS 0.33% · P25

Affected Version Matrix 1

VendorProduct Version RangeStatus
paradigmatools Avalon23 Products Filter for WooCommerce ≤ 1.1.6 affected
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I. Basic Information for CVE-2026-8865

Vulnerability Information
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Vulnerability Title
Avalon23 Products Filter for WooCommerce <= 1.1.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
paradigmatools Avalon23 Products Filter for WooCommerce 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
paradigmatools Avalon23 Products Filter for WooCommerce是paradigmatools组织的一款WooCommerce产品筛选过滤插件。 paradigmatools Avalon23 Products Filter for WooCommerce 1.1.6及之前版本存在跨站脚本漏洞，该漏洞源于对用户提供的短代码属性清理和转义不足，可能导致存储型跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
paradigmatools Avalon23 Products Filter for WooCommerce 0 ~ 1.1.6 -

II. Public POCs for CVE-2026-8865

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III. Intelligence Information for CVE-2026-8865

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Patches & Fixes for CVE-2026-8865 (2)

Other References for CVE-2026-8865 (1)

IV. Related Vulnerabilities

Same weakness: CWE-79

V. Comments for CVE-2026-8865

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