CVE-2026-15282CWE-434

Instant Appointment <= 1.2 - Unauthenticated Arbitrary File Upload

Critical · published July 10, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
64.8
In the wild
Unconfirmed
What it is

The Instant Appointment plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'insapp_upload_image_as_attachment' function in all versions up to, and including, 1.2. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01079 · 64.8th percentile
Weakness
CWE-434 · Unrestricted Upload of File with Dangerous Type
Published
2026-07-10T04:31Z
EPSS history
Timeline
  • 10 JUL 04:31Z
    Instant Appointment <= 1.2 - Unauthenticated Arbitrary File Upload
    cvelistv5