CVE-2026-118500 Details
Description
The Cool FormKit Lite – Advanced Form Builder for Elementor plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via the '_elementor_data.form_fields[].custom_id' parameter in all versions up to, and including, 2.7.9 due to insufficient input sanitization and output escaping. 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. The esc_html() call applied at server emission is bypassed because the HTML fragment-serialization algorithm restores " to a raw double-quote inside text nodes when jQuery .html() extracts the template, allowing the attacker-controlled custom_id to break out of an HTML attribute context within the plugin's own frontend script.
A stored DOM-based cross-site scripting vulnerability has been identified in the Cool FormKit Lite – Advanced Form Builder for Elementor plugin for WordPress, affecting all versions through 2.7.9. The vulnerability arises from inadequate input sanitization and output escaping, allowing authenticated attackers with contributor-level access and above to inject arbitrary web scripts into pages. These scripts execute when a user accesses the compromised page. The issue exploits the '_elementor_data.form_fields[].custom_id' parameter, bypassing the esc_html() function used during server-side rendering. This bypass occurs because the HTML fragment-serialization algorithm converts double quotes into raw double quotes within text nodes when jQuery .html() retrieves the template. Consequently, the attacker-controlled custom_id can escape an HTML attribute context in the plugin's frontend script.
Users are advised to update the Cool FormKit Lite WordPress plugin to version 2.7.10 or a newer patched version.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 30, 2026CISA-ADP
Assessed Oct 30, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Cool FormKit Lite | <= 2.7.9 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 30, 2026 | CVE Modified | CISA-ADP |
| Oct 30, 2026 | New CVE Received | [email protected] |