CVE-2024-3637Public exploitNetwork attack vector

Administrator-level stored XSS via unescaped field names

Published May 3, 2024 · Updated Mar 20, 2025

Stored XSS in ThemeHunk Lead Form Builder & Contact Form before 1.9.8 allows remote authenticated users to run script in visitors' browsers. The form editor stores a crafted Field Name without sanitization, and the shortcode-rendered public form outputs that value without context-appropriate escaping. Administrator-level access is required even when unfiltered_html is disabled, and execution occurs when a visitor loads a page containing the affected form.

CVSS severity6.1
Medium
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in ThemeHunk Lead Form Builder & Contact Form before 1.9.8 allows remote authenticated users to run script in visitors' browsers. The form editor stores a crafted Field Name without sanitization, and the shortcode-rendered public form outputs that value without context-appropriate escaping. Administrator-level access is required even when unfiltered_html is disabled, and execution occurs when a visitor loads a page containing the affected form.

The record

CVE
CVE-2024-3637
Published
May 3, 2024
Updated
Mar 20, 2025
Vendor
ThemeHunk
Product
Lead Form Builder & Contact Form
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 20, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.8.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

ThemeHunk · Lead Form Builder & Contact Formversion=0 <=1.8.9

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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