CVE-2023-4950Public exploitNetwork attack vector

Unauthenticated stored XSS via contact-form name field

Published Oct 16, 2023 · Updated Apr 23, 2025

Stored cross-site scripting in Funnelforms Free before 3.4 allows remote attackers to inject script through a public form. The plugin accepts script markup in the contact form's name field, stores it without sanitization or output escaping, and renders it in the Leads view. No account is required to submit the payload, but execution requires an administrator to open the affected lead, exposing that browser session to script actions.

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 cross-site scripting in Funnelforms Free before 3.4 allows remote attackers to inject script through a public form. The plugin accepts script markup in the contact form's name field, stores it without sanitization or output escaping, and renders it in the Leads view. No account is required to submit the payload, but execution requires an administrator to open the affected lead, exposing that browser session to script actions.

The record

CVE
CVE-2023-4950
Published
Oct 16, 2023
Updated
Apr 23, 2025
Vendor
Funnelforms LLC
Product
Funnelforms Free
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 16, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 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 <3.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Funnelforms LLC · Funnelforms Freeversion=0 <3.4

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1CISA-ADPCVSS: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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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