CVE-2026-87115Critical· 9.1▾ Midnight

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

▾ Midnight zone — Critical, or high with PoC / in-the-wild

Depth score50/ 100 · Moderate

impact 50.1 · likelihood 0.2 · exploitation 0

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Proof of concept

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Published

Oct 3, 2026

Updated

Oct 6, 2026

CVSS

9.1

Vendor

e4jvikwp

Product

VikAppointments Services Booking Calendar

CWE

CWE-22

Depth score

50 · Moderate

EPSS

0.90% · p59

Platforms

—

Source

NVD

Vector

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

CISA SSVC

decided 2026-10-03

Exploitation: none
Automatable: yes
Technical impact: partial

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Oct 3.

0.9% → 0.9%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

4 events · 23 days

Oct 3, 2026Published
Disclosed via NVD
Oct 3, 2026EPSS first tracked
0.9%
Oct 6, 2026Record revised
Last analysed / modified upstream
Oct 26, 2026EPSS peak
0.9% → 0.9%

e4jvikwp CWE-22 #nvd #cve.org

Affected

vikappointments_services_booking_calendar <= 1.2.21

Full technical detail▾

Overview

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.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org

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