CVE-2023-5382

Funnelforms Free <= 3.4 - Cross-Site Request Forgery to Arbitrary Post Deletion

2023-11-01 00:00
Duc Manh

Strategic Overview

Status
Patched in 3.4.2
Affected Plugin
Funnelforms Free – Multi Step Form, Contact Form & Lead Funnel Builder
Affected Version
<= 3.4
CVSS
6.5Medium
Weakness type
CWE-352 · Cross-Site Request Forgery (CSRF)
CVE
CVE-2023-5382
View all Funnelforms Free – Multi Step Form, Contact Form & Lead Funnel Builder vulnerabilities

At a glance

CVE-2023-5382 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the Funnelforms Free WordPress plugin, affecting versions <= 3.4. It carries a CVSS score of 6.5 (reachable over the network; low attack complexity; high integrity impact). Exploitation requires no authentication. The issue is fixed in version 3.4.2; sites on affected versions should update now. Disclosed November 2023, reported by Duc Manh.

Vulnerability Overview

The Funnelforms Free plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 3.4. This is due to missing or incorrect nonce validation on the fnsf_delete_posts function. This makes it possible for unauthenticated attackers to delete arbitrary posts via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site. A successful exploit has high impact on integrity.

CWE-352: Cross-Site Request Forgery (CSRF)

Reaching this weakness in Funnelforms Free <= 3.4 takes a caller who can reach the endpoint. Cross-site request forgery abuses the fact that browsers attach a victim's cookies to any request, so a state-changing action that only checks who you are, not whether you meant to act, can be triggered from another site.

An attacker who gets a logged-in user to load a crafted page can perform that action as them, with the impact scaling to whatever the victim's role is allowed to do. For Funnelforms Free the fix is 3.4.2: builds <= 3.4 are affected, anything from 3.4.2 onward is not.

Remediation

Update to version 3.4.2, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Funnelforms Free: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Funnelforms Free 3.4.2 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-5382https://www.wordfence.com/threat-intel/vulnerabilities/id/72e4428b-d2cd-471f-9821-947f4601fd64https://nvd.nist.gov/vuln/detail/CVE-2023-5382

Related records

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