CVE-2024-33543

WP Time Slots Booking Form <= 1.2.06 - Unauthenticated Price Manipulation

2024-04-25 00:00

Strategic Overview

Status: Patched in 1.2.07
Affected Plugin: WP Time Slots Booking Form
Affected Version: <= 1.2.06
CVSS: 5.3Medium
Weakness type: CWE-472 · External Control of Assumed-Immutable Web Parameter
CVE: CVE-2024-33543

View all WP Time Slots Booking Form vulnerabilities

At a glance

CVE-2024-33543 is a medium-severity External Control of Assumed-Immutable Web Parameter vulnerability in the WP Time Slots Booking Form WordPress plugin, affecting versions <= 1.2.06. 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 1.2.07; sites on affected versions should update now. Disclosed April 2024, reported by Joshua Chan.

Vulnerability Overview

The WP Time Slots Booking Form plugin for WordPress is vulnerable to price manipulation due to insufficient server-side validation of prices in versions up to, and including, 1.2.06. This makes it possible for unauthenticated attackers to alter the price of bookings.

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 WP Time Slots Booking Form <= 1.2.06 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 WP Time Slots Booking Form the fix is 1.2.07: builds <= 1.2.06 are affected, anything from 1.2.07 onward is not.

Remediation

Update to version 1.2.07, 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: WP Time Slots Booking Form 1.2.07 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-2024-33543 https://www.wordfence.com/threat-intel/vulnerabilities/id/e7a731ff-12e9-4fab-a055-c0193b3b2da8 https://nvd.nist.gov/vuln/detail/CVE-2024-33543

Related records

Other vulnerabilities in WP Time Slots Booking Form

CVSS Vector

5.3

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

This record contains material that is subject to copyright

CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

https://www.cve.org/Legal/TermsOfUse

Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.

https://www.wordfence.com/wordfence-intelligence-terms-and-conditions/