CVE-2025-4691 MEDIUM

CVE-2025-4691: Free Booking Plugin for Hotels, Restaurants and Car Rentals – eaSYNC Booking <= 1.3.21 - Insecure Direct Object Reference to Sensitive Information Exposure

Vendor Syntactics
Product eaSYNC Booking – Hotels, Restaurants & Car Rentals
Weakness CWE-639 · IDOR
Published May 31, 2025
Last update April 8, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity None

CVSS vector

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

What the vulnerability does

01Description

The Free Booking Plugin for Hotels, Restaurants and Car Rentals – eaSYNC Booking plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.3.21 via the 'view_request_details' due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to view the details of any booking request. The vulnerability was partially patched in versions 1.3.18 and 1.3.21.

Explanation of Vulnerability in Simple Terms

02Summary

eaSYNC Booking versions up to 1.3.21 contain an authorization flaw that allows unauthenticated attackers to read sensitive booking or configuration data over the network. The vulnerability requires no user interaction and can be exploited remotely. Site administrators should update to a version newer than 1.3.21 to remediate the issue.

What an attacker can do

03Attacker Capabilities

Read sensitive booking or configuration data without authentication.

Potential impact on your site

04Site Impact

Booking details, customer information, or system configuration may be exposed to unauthorized parties.

Conditions required to exploit

05Prerequisites

Network access to the affected eaSYNC Booking installation; no authentication required.

Key dates

06Disclosure timeline

May 31, 2025 CVE published
April 8, 2026 Record updated