{"id":"CVE-2026-109988","kind":"vulnerability","aliases":["CVE-2026-109988"],"related":[],"title":"WooCommerce Product Addons plugin: stored XSS via field type parameter","description":"The Product Addons for Woocommerce – Product Options with Custom Fields plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'fields[section][fields][row][col][type]' parameter in all versions up to, and including, 3.1.8 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with shop manager-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.","summary":"The Product Addons for WooCommerce plugin (all versions up to and including 3.1.8) does not sanitize the 'fields[section][fields][row][col][type]' parameter. An authenticated shop manager can store a script that runs in the browser of anyone who loads the injected page.","severity":"medium","cvss":4.4,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["package","woocommerce","wordpress","wp-plugin"],"not_affected_if":["auth-required"],"how_to_check":"- Check the installed version of the 'Product Addons for Woocommerce' plugin in the WordPress admin under Plugins; affected if it is `3.1.8` or older.\n- unknown","fix":"- Update the 'Product Addons for Woocommerce – Product Options with Custom Fields' plugin to a version newer than `3.1.8`; the sources do not name the fixed version.","status":"open","published_at":"2026-10-28T07:16:45+00:00","first_seen_at":"2026-10-28T07:31:38+00:00","triaged_at":"2026-10-28T07:33:25+00:00","updated_at":"2026-10-28T07:33:25+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-10-28T07:33:25Z","model":"claude-haiku-5-5","output":{"fix":"- Update the 'Product Addons for Woocommerce – Product Options with Custom Fields' plugin to a version newer than `3.1.8`; the sources do not name the fixed version.","reach":"internet","title":"WooCommerce Product Addons plugin: stored XSS via field type parameter","impact":"medium","summary":"The Product Addons for WooCommerce plugin (all versions up to and including 3.1.8) does not sanitize the 'fields[section][fields][row][col][type]' parameter. An authenticated shop manager can store a script that runs in the browser of anyone who loads the injected page.","category":"package","nicknames":[],"who_cares":["wordpress","woocommerce","wp-plugin"],"confidence":0.7,"needs_auth":"yes","worst_case":"Injected scripts run in visitors' and staff browsers on the store","analyst_note":"","how_to_check":"- Check the installed version of the 'Product Addons for Woocommerce' plugin in the WordPress admin under Plugins; affected if it is `3.1.8` or older.\n- unknown","needs_analyst":false,"not_affected_if":["auth-required"],"who_is_affected":"Sites running the Product Addons for WooCommerce plugin at version 3.1.8 or older. Exploitation needs a shop manager-level account or higher, so sites that restrict shop manager accounts face less risk. Sites without this plugin are not affected.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000602,"input_tokens":3391,"output_tokens":526,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-109988':13A,16A '-2026':12A,15A '3.1.8':35B,104C 'access':125C,141C 'addon':3A,25B,69C 'anyon':61B 'arbitrari':130C 'attack':119C 'authent':48B,118C 'browser':59B 'col':44B,94C 'cross':85C 'cross-sit':84C 'custom':75C 'cve':11A,14A 'due':105C 'escap':112C 'execut':137C 'field':8A,40B,42B,76C,90C,92C 'includ':34B,103C 'inject':65B,129C,143C 'input':108C 'insuffici':107C 'level':124C 'load':63B 'make':114C 'manag':50B,123C 'manager-level':122C 'option':73C 'output':111C 'packag':17B 'page':66B,134C,144C 'paramet':10A,46B,96C 'plugin':4A,22B,28B,77C 'possibl':116C 'product':2A,24B,68C,72C 'row':43B,93C 'run':56B 'sanit':38B,109C 'script':54B,87C,132C 'section':41B,91C 'shop':49B,121C 'site':86C 'store':5A,52B,83C 'type':9A,45B,95C 'user':140C 'version':30B,99C 'via':7A,88C 'vulner':81C 'web':131C 'whenev':138C 'woocommerc':1A,18B,27B,71C 'wordpress':19B,79C 'wp':21B 'wp-plugin':20B 'xss':6A","nicknames":[],"mitigations":[],"who_affected":"Sites running the Product Addons for WooCommerce plugin at version 3.1.8 or older. Exploitation needs a shop manager-level account or higher, so sites that restrict shop manager accounts face less risk. Sites without this plugin are not affected.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-28T07:16:45+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N","cvss_by":"security@wordfence.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-109988","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109988","severity":null,"published_at":"2026-10-28T07:16:45+00:00","modified_at":"2026-10-28T07:16:45+00:00","first_seen_at":"2026-10-28T07:31:38+00:00","fetched_at":"2026-10-28T07:31:38+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}