CVE-2024-1056Network attack vector

Contributor-level stored XSS via globally relaxed sanitization

Published Aug 29, 2024 · Updated Apr 8, 2026

Stored XSS in FunnelKit Funnel Builder Pro 3.4.5 and earlier allows remote authenticated users to inject scripts into WordPress posts. The allow_iframe_tag_in_post function uses wp_kses_allowed_html to allow script and iframe elements globally instead of constraining them to FunnelKit content. Contributor access is sufficient to persist code that executes when another user opens the injected page, exposing that user's browser session to script actions.

CVSS severity6.4
Medium
EPSS probability0.26%
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 FunnelKit Funnel Builder Pro 3.4.5 and earlier allows remote authenticated users to inject scripts into WordPress posts. The allow_iframe_tag_in_post function uses wp_kses_allowed_html to allow script and iframe elements globally instead of constraining them to FunnelKit content. Contributor access is sufficient to persist code that executes when another user opens the injected page, exposing that user's browser session to script actions.

The record

CVE
CVE-2024-1056
Published
Aug 29, 2024
Updated
Apr 8, 2026
Vendor
Wisetr INC.
Product
FunnelKit Funnel Builder Pro
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 29, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record 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 <=3.4.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Wisetr INC. · FunnelKit Funnel Builder Proversion=0 <=3.4.5

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

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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