CVE-2026-15282

CRITICAL 9.8

Instant Appointment <= 1.2 - Unauthenticated Arbitrary File Upload

CVSS Score

9.8

EPSS Score

0.7%

EPSS Percentile

50th

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.

CWE	CWE-434
Vendor	tenteeglobal
Product	instant appointment
Published	Jul 10, 2026
Last Updated	Jul 14, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

tenteeglobal / Instant Appointment

0 ≤ 1.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/097b1530-64fa-45b2-85f3-c6a2311405b5?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/instant-appointment/trunk/includes/ajax/ajax_services.php#L3 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/instant-appointment/trunk/includes/front-end/ajax/login_ajax.php#L584 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/instant-appointment/trunk/includes/front-end/ajax/login_ajax.php#L598

Credits

Random Robbie