WPForms Pro <= 2.0.0.2 - Unauthenticated Stored Cross-Site Scripting via Single Line Text and Paragraph Text Field Values (CVE-2026-18409) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-18409

WPForms Pro <= 2.0.0.2 - Unauthenticated Stored Cross-Site Scripting via Single Line Text and Paragraph Text Field Values

Answer in brief

CVE-2026-18409 records a Unknown severity vulnerability in WPForms Pro <= 2.0.0.2 - Unauthenticated Stored Cross-Site Scripting via Single Line Text and Paragraph Text Field Values. The current sources do not mark it as known exploited. The current feed maps WPForms/WPForms Pro (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 21, 2026Updated Aug 21, 2026Source checked Aug 21, 2026First seen by HOL Aug 21, 2026Material review Aug 21, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps WPForms/WPForms Pro (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
WPForms/WPForms Progeneric	0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for WPForms/WPForms Pro.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Aug 21, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 21, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 21, 2026

Sources and claim methodology

Upstream source description

The WPForms Pro plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Single Line Text and Paragraph Text Field Values in all versions up to, and including, 2.0.0.2 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. The exploit relies on the plugin's own wp_kses_allowed_html filter widening the 'post' allowlist to permit iframe elements with a data-src attribute, which is not on WordPress's URI-attribute sanitization list, allowing a javascript: URI stored in data-src to survive kses processing and subsequently be promoted to a live src attribute by the bundled admin script view-entry.min.js.

Quoted source text, attributed separately from HOL analysis.