CVE-2025-12878Network attack vector

Contributor-level stored XSS via unescaped shortcode default

Published Nov 19, 2025 · Updated Nov 19, 2025

Stored XSS in FunnelKit Funnel Builder 3.13.1.2 and earlier allows remote authenticated users to inject scripts through wfop_phone. The wfop_phone shortcode returns its user-controlled default attribute without sufficient input sanitization or output escaping, so the value is stored in page content and interpreted as script when rendered. Contributor-level access is required to place the shortcode, and viewing the affected page executes the injected script in the visitor's browser.

CVSS severity6.4
Medium
EPSS probability0.24%
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 3.13.1.2 and earlier allows remote authenticated users to inject scripts through wfop_phone. The wfop_phone shortcode returns its user-controlled default attribute without sufficient input sanitization or output escaping, so the value is stored in page content and interpreted as script when rendered. Contributor-level access is required to place the shortcode, and viewing the affected page executes the injected script in the visitor's browser.

The record

CVE
CVE-2025-12878
Published
Nov 19, 2025
Updated
Nov 19, 2025
Vendor
FunnelKit
Product
FunnelKit Funnel Builder
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 19, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 19, 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=* <=3.13.1.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

FunnelKit · FunnelKit Funnel Builderversion=* <=3.13.1.2

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/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.

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Technologies

Your stack

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Your stack

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