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CVE-2026-87115: VikAppointments Services Booking Calendar

Severity

9.1 (CRITICAL)

Vendor

E4JVIKWP

Affected versions

0 through 1.2.21

Patch status

Unknown

Published

2026-10-03T07:16:48.347

Modified

2026-10-03T07:16:48.347

Why it matters

This matters because the affected product may be exposed on public websites. A vulnerable plugin can create a direct path to site compromise, malicious code deployment, or data theft.

Recommended admin actions

• Prioritize validation immediately due to critical CVSS severity.
• Check whether the affected WordPress plugin or theme is installed.
• Update, disable, or remove the affected component if present.
• Treat internet-facing systems as higher priority.
• Review logs for suspicious activity related to the affected application or component.

Technical summary

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.

View the official NVD record for CVE-2026-87115

CVE data is sourced from NVD/CNA records and optional enrichment. Validate against the vendor advisory before taking production action.