croixhaug Appointment Booking Calendar Plugin up to 1.6.9.29 on WordPress get_item_permissions_check ID authorization

Summaryinfo

A vulnerability categorized as problematic has been discovered in croixhaug Appointment Booking Calendar Plugin up to 1.6.9.29 on WordPress. This affects the function get_item_permissions_check. The manipulation of the argument ID results in authorization. This vulnerability is known as CVE-2026-1704. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability classified as problematic has been found in croixhaug Appointment Booking Calendar Plugin up to 1.6.9.29 on WordPress. Affected is the function get_item_permissions_check. The manipulation of the argument ID with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. This is going to have an impact on confidentiality. CVE summarizes:

The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.6.9.29. This is due to the `get_item_permissions_check` method granting access to users with the `ssa_manage_appointments` capability without validating staff ownership of the requested appointment. This makes it possible for authenticated attackers, with custom-level access and above (users granted the ssa_manage_appointments capability, such as Team Members), to view appointment records belonging to other staff members and access sensitive customer personally identifiable information via the appointment ID parameter.

The weakness was published by Itthidej Aramsri. The advisory is shared for download at wordfence.com. This vulnerability is traded as CVE-2026-1704 since 01/30/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 03/20/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Appointment Software

Vendor

• croixhaug

Name

• Appointment Booking Calendar Plugin

Version

• 1.6.9.0
• 1.6.9.1
• 1.6.9.2
• 1.6.9.3
• 1.6.9.4
• 1.6.9.5
• 1.6.9.6
• 1.6.9.7
• 1.6.9.8
• 1.6.9.9
• 1.6.9.10
• 1.6.9.11
• 1.6.9.12
• 1.6.9.13
• 1.6.9.14
• 1.6.9.15
• 1.6.9.16
• 1.6.9.17
• 1.6.9.18
• 1.6.9.19
• 1.6.9.20
• 1.6.9.21
• 1.6.9.22
• 1.6.9.23
• 1.6.9.24
• 1.6.9.25
• 1.6.9.26
• 1.6.9.27
• 1.6.9.28
• 1.6.9.29

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Once again VulDB remains the best source for vulnerability data.

Discussion