CVE-2023-23991

Booking Calendar <= 9.4.2 - Authenticated (Admin+) SQL Injection

2023-01-20 00:00
Rafshanzani Suhada

Strategic Overview

Status
Patched in 9.4.3.1
Affected Plugin
Booking Calendar
Affected Version
<= 9.4.2
CVSS
6.6Medium
Weakness type
CWE-89 · Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CVE
CVE-2023-23991
View all Booking Calendar vulnerabilities

At a glance

CVE-2023-23991 is a medium-severity Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in the Booking Calendar WordPress plugin, affecting versions <= 9.4.2. It carries a CVSS score of 6.6 (reachable over the network; high confidentiality, integrity, availability impact). Exploitation requires an authenticated account at Admin level or above. The issue is fixed in version 9.4.3.1; sites on affected versions should update now. Disclosed January 2023, reported by Rafshanzani Suhada.

Vulnerability Overview

The Booking Calendar plugin for WordPress is vulnerable to SQL Injection via an unknown parameter in versions up to, and including, 9.4.2 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with administrative privileges, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. 

Technical Analysis

The vector marks this flaw as remotely reachable over the network, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.

CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Reaching this weakness in Booking Calendar <= 9.4.2 takes an account at Admin level or above. SQL injection happens when request data is concatenated into a query instead of being bound as a parameter, letting an attacker change the structure of the statement rather than just its values.

A working injection can read any table the database user can see, which on a WordPress install means user records, password hashes and session or API secrets stored in options. For Booking Calendar the fix is 9.4.3.1: builds <= 9.4.2 are affected, anything from 9.4.3.1 onward is not.

Remediation

Update to version 9.4.3.1, 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: Booking Calendar 9.4.3.1 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-23991https://www.wordfence.com/threat-intel/vulnerabilities/id/2a69576e-4796-421a-b6ee-08a3b40d4805https://nvd.nist.gov/vuln/detail/CVE-2023-23991

Related records

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