CVE-2023-5383Network attack vector

Arbitrary post duplication via missing nonce validation

Published Nov 22, 2023 · Updated Apr 8, 2026

Cross-site request forgery in Funnelforms LLC Funnelforms Free 3.4 and earlier allows remote attackers to duplicate arbitrary posts. The fnsf_copy_posts function accepts a post-copying request without valid nonce verification, so the server treats a request induced from another site as intentional. Exploitation requires a logged-in site administrator to take an attacker-induced action, such as following a link; the bounded result is creation of copies of attacker-selected posts.

CVSS severity4.3
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in Funnelforms LLC Funnelforms Free 3.4 and earlier allows remote attackers to duplicate arbitrary posts. The fnsf_copy_posts function accepts a post-copying request without valid nonce verification, so the server treats a request induced from another site as intentional. Exploitation requires a logged-in site administrator to take an attacker-induced action, such as following a link; the bounded result is creation of copies of attacker-selected posts.

The record

CVE
CVE-2023-5383
Published
Nov 22, 2023
Updated
Apr 8, 2026
Vendor
Funnelforms LLC
Product
Funnelforms Free
Classifications
CWE-352
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 22, 2023CVE 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

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Funnelforms LLC · Funnelforms Freeversion=0 <=3.4

Published CVSS scores

4.3WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)

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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