CVE-2026-87115
Received Received - Intake

Arbitrary File Deletion in VikAppointments Services Booking Calendar WordPress Plugin

Publication date: 2026-10-03

Last updated on: 2026-10-03

Assigner: Wordfence

Description
The VikAppointments Services Booking Calendar plugin for WordPress is vulnerable to arbitrary file deletion due to insufficient file path validation in the extract function in all versions up to, and including, 1.2.21. This makes it possible for unauthenticated attackers to delete arbitrary files on the server, which can easily lead to remote code execution when the right file is deleted (such as wp-config.php). Exploitation requires at least one File-type custom field to be published on the confirmation page shortcode, as this field is not created by default during plugin installation.

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Meta Information

Published
2026-10-03
Last Modified
2026-10-03
Generated
2026-10-03
AI Q&A
2026-10-03
EPSS Evaluated
N/A
NVD
CVE-2026-87115
EUVD
EUVD-2026-91958

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
vikappointments services_booking_calendar to 1.2.21 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-22 The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

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Executive Summary

The VikAppointments Services Booking Calendar plugin for WordPress has a vulnerability that allows unauthenticated attackers to delete arbitrary files on the server due to insufficient file path validation in the extract function. This flaw exists in versions up to and including 1.2.21.

Detection Guidance

Check for the presence of the VikAppointments Services Booking Calendar plugin version 1.2.21 or lower. Inspect WordPress installations for custom File-type fields on confirmation page shortcodes. Monitor server logs for unusual file deletion activities.

Impact Analysis

This vulnerability can lead to remote code execution if critical files like wp-config.php are deleted. Attackers can exploit it without authentication, potentially taking full control of the WordPress site.

Compliance Impact

This vulnerability could lead to unauthorized file deletion, potentially exposing sensitive data such as configuration files (e.g., wp-config.php) that may contain credentials or database details. This could result in data breaches, violating GDPR and HIPAA requirements for data protection and confidentiality.

Mitigation Strategies

Update the VikAppointments Services Booking Calendar plugin to the latest version. Remove any File-type custom fields from confirmation page shortcodes. Implement file integrity monitoring to detect unauthorized deletions.

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