CVE-2026-87115Network attack vectorHinoki check available

Unauthenticated file deletion via unchecked custom-field path

Published Oct 3, 2026 · Updated Oct 3, 2026

Arbitrary file deletion in VikAppointments Services Booking Calendar 1.2.21 and earlier allows remote attackers to delete files via booking forms. The extract function insufficiently validates the file path supplied through the old_vapcfN custom-field parameter before deleting the referenced file. Exploitation requires a File-type custom field published on the confirmation-page shortcode, which is absent by default; deletion of critical files can disrupt the site or enable code execution.

CVSS severity9.1
Critical
EPSS probability0.88%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Arbitrary file deletion in VikAppointments Services Booking Calendar 1.2.21 and earlier allows remote attackers to delete files via booking forms. The extract function insufficiently validates the file path supplied through the old_vapcfN custom-field parameter before deleting the referenced file. Exploitation requires a File-type custom field published on the confirmation-page shortcode, which is absent by default; deletion of critical files can disrupt the site or enable code execution.

The record

CVE
CVE-2026-87115
Published
Oct 3, 2026
Updated
Oct 3, 2026
Vendor
E4J s.r.l.
Product
VikAppointments
Classifications
CWE-22, T1485
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.2.21

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

E4J s.r.l. · VikAppointmentsversion=0 <=1.2.21

Published CVSS scores

9.1WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1485Data Destruction

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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