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Vulnerability record · CVE-2026-87115 · published 3 October 2026

CVE-2026-87115: Path traversal vulnerability

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.

9.1 CVSS 3.1 Critical EPSS 0.88% · top 42.3% CWE-22 · Path traversal Received
9.1CVSS 3.1 base score
0.88%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
10References
3 Oct 2026Last modified by NVD

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.

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

References

LinkTags
https://plugins.trac.wordpress.org/browser/vikappointments/tags/1.2.19/site/controllers/confirmapp.php#L88
https://plugins.trac.wordpress.org/browser/vikappointments/tags/1.2.19/site/helpers/libraries/customfields/types/file.ph
https://plugins.trac.wordpress.org/browser/vikappointments/tags/1.2.19/site/helpers/libraries/customfields/types/file.ph
https://plugins.trac.wordpress.org/browser/vikappointments/tags/1.2.19/vikappointments.php#L237
https://plugins.trac.wordpress.org/browser/vikappointments/tags/1.2.21/site/controllers/confirmapp.php#L88
https://plugins.trac.wordpress.org/browser/vikappointments/tags/1.2.21/site/helpers/libraries/customfields/types/file.ph
https://plugins.trac.wordpress.org/browser/vikappointments/tags/1.2.21/site/helpers/libraries/customfields/types/file.ph
https://plugins.trac.wordpress.org/browser/vikappointments/tags/1.2.21/vikappointments.php#L237
https://plugins.trac.wordpress.org/changeset?reponame=&old=3721264%40vikappointments&new=3721264%40vikappointments
https://www.wordfence.com/threat-intel/vulnerabilities/id/75fc5df5-a774-4fe1-8452-d35ba7b69081?source=cve

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Source: NIST National Vulnerability Database (record CVE-2026-87115), CISA KEV, FIRST EPSS (scores of 2026-10-03). This page is refreshed as NVD updates the record.