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
Interactive Contact Form and Multi Step Form Builder with Drag & Drop Editor – Funnelforms Free
Affected Version
<= 3.4
CVSS
6.5Medium
Weakness type
CWE-352 · Cross-Site Request Forgery (CSRF)
CVE
CVE-2023-5382
View all Interactive Contact Form and Multi Step Form Builder with Drag & Drop Editor – Funnelforms Free vulnerabilities

At a glance

CVE-2023-5382 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the Interactive Contact Form and Multi Step Form Builder with Drag & Drop Editor 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 Interactive Contact Form and Multi Step Form Builder with Drag & Drop Editor <= 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 Interactive Contact Form and Multi Step Form Builder with Drag & Drop Editor 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 Interactive Contact Form and Multi Step Form Builder with Drag & Drop Editor: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Interactive Contact Form and Multi Step Form Builder with Drag & Drop Editor 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

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C