CVE-2023-24373

Booking calendar, Appointment Booking System <= 3.2.3 - Unauthenticated Bypass Vulnerability

2023-01-27 00:00
yuyudhn

Strategic Overview

Status
Patched in 3.2.4
Affected Plugin
Booking calendar, Appointment Booking System
Affected Version
<= 3.2.3
CVSS
5.3Medium
Weakness type
CWE-472 · External Control of Assumed-Immutable Web Parameter
CVE
CVE-2023-24373
View all Booking calendar, Appointment Booking System vulnerabilities

At a glance

CVE-2023-24373 is a medium-severity External Control of Assumed-Immutable Web Parameter vulnerability in the Booking calendar, Appointment Booking System WordPress plugin, affecting versions <= 3.2.3. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 3.2.4; sites on affected versions should update now. Disclosed January 2023, reported by yuyudhn.

Vulnerability Overview

The Booking calendar, Appointment Booking System plugin for WordPress is vulnerable to a bypass in all versions up to, and including, 3.2.3. This makes it possible for unauthenticated attackers to bypass controls. It is unclear from the original source of this vulnerability what the actual impact is.

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, and no interaction from a victim user.

CWE-472: External Control of Assumed-Immutable Web Parameter

Reaching this weakness in Booking calendar, Appointment Booking System <= 3.2.3 takes no account at all. External control of an assumed-immutable parameter means the code trusts a value it believes cannot be changed by the caller, when in fact the request carries it.

Editing that field changes the outcome of the operation, which on commerce plugins means altered prices or totals and on account flows means acting as another user. For Booking calendar, Appointment Booking System the fix is 3.2.4: builds <= 3.2.3 are affected, anything from 3.2.4 onward is not.

Remediation

Update to version 3.2.4, or a newer patched version

How does WordSec protect against this?

Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Booking calendar, Appointment Booking System 3.2.4 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-24373https://www.wordfence.com/threat-intel/vulnerabilities/id/f87efb65-b53b-4e9c-b933-9303461487a3https://nvd.nist.gov/vuln/detail/CVE-2023-24373

Related records

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