CVE Catalog

CVE-2026-8865

MediumCVSS 6.4
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.19%

9th percentile - higher than 9% of all known CVEs

Summary

The Avalon23 Products Filter for WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting (XSS) via the 'avalon23_qr' shortcode in versions up to 1.1.6. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes.

Risk Assessment

Authenticated attackers with Contributor-level access and above can inject arbitrary web scripts that will execute whenever a user accesses the injected page. This poses a serious threat to user data security and site integrity.

Recommendation

It is recommended to update the plugin to the latest version to mitigate this vulnerability. Additionally, conducting a security audit to identify and eliminate potential XSS threats is advisable.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS