{
 "id": "WPSEC-2026-1193",
 "url": "https://wpsec.com/vuln/WPSEC-2026-1193/",
 "json_url": "https://wpsec.com/vuln/WPSEC-2026-1193/advisory.json",
 "markdown_url": "https://wpsec.com/vuln/WPSEC-2026-1193/index.md",
 "title": "Fluent Forms <= 6.2.15 - Unauthenticated Payment Bypass via Oversized Payment Amounts, Quantities and Checkbox Values",
 "description": "The Fluent Forms plugin for WordPress is vulnerable to a payment bypass via payment form inputs in all versions up to, and including, 6.2.15, due to insufficient validation of user-supplied payment amounts, custom subscription values, item quantities and checkbox payment item values. Infinite or oversized numbers (such as 1e400) passed the positive-number check, and scalar checkbox values passed the option check. This makes it possible for unauthenticated attackers to submit values that make the stored order total zero or drop server-priced items, so the payment gateway is skipped and paid items or services are obtained for free.",
 "plugin": {
  "slug": "fluentform",
  "name": "Fluent Forms",
  "full_name": "Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder",
  "wordpress_org": "https://wordpress.org/plugins/fluentform/",
  "advisories_url": "https://wpsec.com/vuln/plugin/fluentform/",
  "attacksurface": "https://attacksurface.wpsec.com/plugin/fluentform"
 },
 "type": "BYPASS",
 "cwe": [
  "CWE-20"
 ],
 "cve": [],
 "cvss": {
  "version": "3.1",
  "score": 5.3,
  "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
  "severity": "Medium"
 },
 "affected": {
  "ranges": [
   {
    "from": null,
    "from_inclusive": true,
    "to": "6.2.16",
    "to_inclusive": false
   }
  ],
  "text": [
   "all versions before 6.2.16"
  ]
 },
 "introduced_in": null,
 "fixed_in": "6.2.16",
 "remediation": "Update to 6.2.16 or later.",
 "fix_released": "2026-10-16T13:59:08+00:00",
 "published": "2026-10-17T14:43:07+00:00",
 "updated": "2026-10-17T09:24:45.497777+00:00",
 "also_published_as": null,
 "references": [
  "https://wpsec.com/vuln/WPSEC-2026-1193/",
  "https://plugins.svn.wordpress.org/fluentform/tags/6.2.16/",
  "https://wordpress.org/plugins/fluentform/"
 ],
 "attacksurface_url": "https://attacksurface.wpsec.com/plugin/fluentform",
 "source": "WPSec",
 "license": {
  "name": "CC BY 4.0",
  "url": "https://creativecommons.org/licenses/by/4.0/"
 },
 "usage": {
  "plugin": "High",
  "affected_versions": "High",
  "as_of": "2026-10-17"
 }
}