CVE-2023-26526

Bookly <= 21.7.1 - Arbitrary File Deletion

2023-05-11 00:00
Rafie Muhammad

Strategic Overview

Status
Patched in 21.8
Affected Plugin
Online Scheduling and Appointment Booking System – Bookly
Affected Version
<= 21.7.1
CVSS
8.1High
Weakness type
CWE-862 · Missing Authorization
CVE
CVE-2023-26526
View all Online Scheduling and Appointment Booking System – Bookly vulnerabilities

At a glance

CVE-2023-26526 is a high-severity Missing Authorization vulnerability in the Online Scheduling and Appointment Booking System WordPress plugin, affecting versions <= 21.7.1. It carries a CVSS score of 8.1 (reachable over the network; low attack complexity; high integrity, availability impact). The issue is fixed in version 21.8; sites on affected versions should update now. Disclosed May 2023, reported by Rafie Muhammad.

Vulnerability Overview

The Bookly plugin for WordPress is vulnerable to arbitrary file deletion in versions up to, and including, 21.7.1. This makes it possible for authenticated attackers with staff-level access to delete arbitrary files on the affected site's server which may make a site takeover possible.

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 interaction from a victim user. A successful exploit has high impact on integrity, availability.

CWE-862: Missing Authorization

Reaching this weakness in Online Scheduling and Appointment Booking System <= 21.7.1 takes a caller who can reach the endpoint. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For Online Scheduling and Appointment Booking System the fix is 21.8: builds <= 21.7.1 are affected, anything from 21.8 onward is not.

Remediation

Update to version 21.8, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Online Scheduling and Appointment Booking System 21.8 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-26526https://www.wordfence.com/threat-intel/vulnerabilities/id/5a7609bf-5b20-440c-9984-eeb26962ada8https://nvd.nist.gov/vuln/detail/CVE-2023-26526

Related records

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