CVE-2023-24402

WP Booking System <= 2.0.18 - Authenticated (Admin+) Stored Cross Site Scripting

2023-02-02 00:00
Abdi Pranata

Strategic Overview

Status
Patched in 2.0.18.1
Affected Plugin
WP Booking System – Booking Calendar
Affected Version
<= 2.0.18
CVSS
4.4Medium
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE-2023-24402
View all WP Booking System – Booking Calendar vulnerabilities

At a glance

CVE-2023-24402 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the WP Booking System WordPress plugin, affecting versions <= 2.0.18. It carries a CVSS score of 4.4 (reachable over the network). Exploitation requires an authenticated account at Admin level or above. The issue is fixed in version 2.0.18.1; sites on affected versions should update now. Disclosed February 2023, reported by Abdi Pranata.

Vulnerability Overview

The WP Booking System plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 2.0.18 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers with administrator privileges to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, and no interaction from a victim user.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Reaching this weakness in WP Booking System <= 2.0.18 takes an account at Admin level or above. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For WP Booking System the fix is 2.0.18.1: builds <= 2.0.18 are affected, anything from 2.0.18.1 onward is not.

Remediation

Update to version 2.0.18.1, or a newer patched version

How does WordSec protect against this?

An attacker needs Admin access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: WP Booking System 2.0.18.1 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-24402https://www.wordfence.com/threat-intel/vulnerabilities/id/540fef7f-8952-4525-9d07-fe3b3d777359https://nvd.nist.gov/vuln/detail/CVE-2023-24402

Related records

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