{"id":"CVE-2026-8865","aliases":["EUVD-2026-38683","GHSA-hxr4-2fcj-gcw3"],"status":"published","title":"Avalon23 Products Filter for WooCommerce \u003c= 1.1.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes","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.","severity":{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00331,"percentile":0.26586,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2026-06-24T05:33:31Z","modified":"2026-06-25T14:16:56Z","products":[{"vendor":"paradigmatools","product":"avalon23 products filter for woocommerce"}],"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/da9089a2-420f-4744-96d1-46c050a95328?source=cve"},{"url":"https://plugins.trac.wordpress.org/browser/avalon23-products-filter-for-woocommerce/trunk/ext/qr_generator/index.php#L113"},{"url":"https://plugins.trac.wordpress.org/browser/avalon23-products-filter-for-woocommerce/trunk/ext/qr_generator/index.php#L96"},{"url":"https://plugins.trac.wordpress.org/browser/avalon23-products-filter-for-woocommerce/trunk/classes/helper.php#L17"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-8865"},{"url":"https://github.com/advisories/GHSA-hxr4-2fcj-gcw3"}],"sources":{"cve":[{"id":"CVE-2026-8865","title":"Avalon23 Products Filter for WooCommerce \u003c= 1.1.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes","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.","status":"published","published":"2026-06-24T05:33:31.265Z","modified":"2026-06-25T13:30:28.749Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T13:48:13.398044Z"}],"euvd":[{"id":"EUVD-2026-38683","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.","status":"published","published":"2026-06-24T05:33:31Z","modified":"2026-06-25T13:30:28Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T18:20:29.213001Z"}],"ghsa":[{"id":"GHSA-hxr4-2fcj-gcw3","title":"The Avalon23 Products Filter for WooCommerce plugin for WordPress is vulnerable to Stored Cross...","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.","status":"published","published":"2026-06-24T09:30:47Z","modified":"2026-06-24T09:30:54Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:08:57.478089Z"}],"nvd":[{"id":"CVE-2026-8865","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.","status":"published","published":"2026-06-24T07:16:28.543Z","modified":"2026-06-25T14:16:56.293Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:25.288279Z"}]}}