CVE-2023-25037

Booking Calendar Contact Form <= 1.2.34 - Cross-Site Request Forgery via cpdexbccf_feedback

2023-02-06 00:00
István Márton

Strategic Overview

Status
Patched in 1.2.35
Affected Plugin
Booking Calendar Contact Form
Affected Version
<= 1.2.34
CVSS
4.3Medium
Weakness type
CWE-352 · Cross-Site Request Forgery (CSRF)
CVE
CVE-2023-25037
View all Booking Calendar Contact Form vulnerabilities

At a glance

CVE-2023-25037 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the Booking Calendar Contact Form WordPress plugin, affecting versions <= 1.2.34. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 1.2.35; sites on affected versions should update now. Disclosed February 2023, reported by István Márton.

Vulnerability Overview

The Booking Calendar Contact Form plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.2.34. This is due to missing or incorrect nonce validation on the cpdexbccf_feedback function called via the cpdexbccf_feedback AJAX action. This makes it possible for unauthenticated attackers to perform an unauthorized feedback form submission 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.

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

Reaching this weakness in Booking Calendar Contact Form <= 1.2.34 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 Booking Calendar Contact Form the fix is 1.2.35: builds <= 1.2.34 are affected, anything from 1.2.35 onward is not.

Remediation

Update to version 1.2.35, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Booking Calendar Contact Form: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Booking Calendar Contact Form 1.2.35 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-25037https://www.wordfence.com/threat-intel/vulnerabilities/id/09932277-8af3-4790-96f0-fe5af0a0ed29https://nvd.nist.gov/vuln/detail/CVE-2023-25037

Related records

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