CVE-2022-4036

Appointment Hour Booking <= 1.3.72 - CAPTCHA Bypass

2022-11-29 00:00

Strategic Overview

Status: Patched in 1.3.73
Affected Plugin: Appointment Hour Booking – Booking Calendar
Affected Version: <= 1.3.72
CVSS: 5.3Medium
Weakness type: CWE-804 · Guessable CAPTCHA
CVE: CVE-2022-4036

View all Appointment Hour Booking – Booking Calendar vulnerabilities

At a glance

CVE-2022-4036 is a medium-severity Guessable CAPTCHA vulnerability in the Appointment Hour Booking WordPress plugin, affecting versions <= 1.3.72. 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 1.3.73; sites on affected versions should update now. Disclosed November 2022, reported by Luca Greeb.

Vulnerability Overview

The Appointment Hour Booking plugin for WordPress is vulnerable to CAPTCHA bypass in versions up to, and including, 1.3.72. This is due to the use of insufficiently strong hashing algorithm on the CAPTCHA secret that is also displayed to the user via a cookie.

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-804: Guessable CAPTCHA

The product uses a CAPTCHA challenge, but the challenge can be guessed or automatically recognized by a non-human actor.

Remediation

Update to version 1.3.73, 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: Appointment Hour Booking 1.3.73 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2022-4036 https://www.wordfence.com/threat-intel/vulnerabilities/id/f62d28bd-fa33-4f0b-a116-5aacc05bfa3a https://nvd.nist.gov/vuln/detail/CVE-2022-4036

Related records

Same weakness class

5.3CVE-2024-32720: Appointment Hour Booking <= 1.4.56 Captcha BypassCVE-2024-32720

Other vulnerabilities in Appointment Hour Booking – Booking Calendar

CVSS Vector

5.3

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityLow
IntegrityNone
AvailabilityNone

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