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CVE EVIDENCE REVIEW
ReviewHighEvidence review

CVE-2026-18331 evidence review

strategy11team Formidable Forms – WordPress Form Builder for Contact Forms, Calculators, Quizzes & More

The Formidable Forms – WordPress Form Builder for Contact Forms, Calculators, Quizzes & More plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'frm_user_id' parameter in all versions up to, and including, 6.33.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. By forging frm_user_id to match an administrator's user ID — discoverable via the public WordPress REST API — an unauthenticated attacker causes w...

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Evidence review

This record remains available for product and version identification, but it is not presented as a complete remediation procedure. Confirm the affected range and the supported fix in a direct vendor advisory before changing production systems.

Productstrategy11team Formidable Forms – WordPress Form Builder for Contact Forms, Calculators, Quizzes & More
Affected versions<= 6.33.1
Fixed versionsNo verified fixed-version field is available yet
Priority basisReview · CVSS 7.2 · EPSS 0.37%
01

Identify the product and installed version

Record whether strategy11team Formidable Forms – WordPress Form Builder for Contact Forms, Calculators, Quizzes & More is present, where it is installed, and which interfaces are exposed.

  • Record the product name, package or appliance identifier, and installed version.
  • Identify internet-facing, administrative, API, and internal access paths.
  • Preserve the pre-change configuration and relevant service logs.
02

Compare the affected range

Use the current record as an identification aid: <= 6.33.1. Resolve incomplete inventory results before deciding that an asset is unaffected.

03

Verify the authoritative remediation source

Open the linked source material and locate a direct vendor advisory for this CVE. Confirm the supported fixed release and product-specific update path before making a production change.

Operational boundary

This page does not replace the vendor advisory, support contract, change-management process, or recovery plan. Do not infer that an asset is unaffected from an incomplete inventory query or a missing fixed-version field.