CVE-2023-3427

Salon Booking System <= 8.4.6 - Cross-Site Request Forgery to Admin Role Change to Customer, User Meta Update via save_customer

2023-06-27 00:00
István Márton

Strategic Overview

Status
Patched in 8.4.8
Affected Plugin
Salon Booking System – Appointment Booking for Salons, Barbershops & Spas
Affected Version
<= 8.4.7
CVSS
5.4Medium
Weakness type
CWE-352 · Cross-Site Request Forgery (CSRF)
CVE
CVE-2023-3427
View all Salon Booking System – Appointment Booking for Salons, Barbershops & Spas vulnerabilities

At a glance

CVE-2023-3427 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the Salon Booking System WordPress plugin, affecting versions <= 8.4.7. It carries a CVSS score of 5.4 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 8.4.8; sites on affected versions should update now. Disclosed June 2023, reported by István Márton.

Vulnerability Overview

The Salon Booking System plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 8.4.6. This is due to missing or incorrect nonce validation on the 'save_customer' function. This makes it possible for unauthenticated attackers to change the admin role to customer or change the user meta to arbitrary values 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)

Salon Booking System <= 8.4.7 carries this weakness at save_customer, and reaching it 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 Salon Booking System the fix is 8.4.8: builds <= 8.4.7 are affected, anything from 8.4.8 onward is not.

Remediation

Update to version 8.4.8, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Salon Booking System: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Salon Booking System 8.4.8 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-3427https://www.wordfence.com/threat-intel/vulnerabilities/id/93875f19-d9b9-4e33-bba9-afc75cf26bf2https://nvd.nist.gov/vuln/detail/CVE-2023-3427

Related records

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