Arbitrary File Upload Vulnerability in Instant Appointment Plugin for WordPress
CVE-2026-15282

9.8CRITICAL

Key Information:

Vendor

WordPress
Status
Instant Appointment
Vendor
CVE Published:
10 July 2026

What is CVE-2026-15282?

The Instant Appointment plugin for WordPress is susceptible to arbitrary file uploads due to inadequate file type validation in its 'insapp_upload_image_as_attachment' function. This flaw affects all versions up to and including 1.2, allowing unauthenticated attackers to upload arbitrary files to the server hosting the affected site. Such unauthorized file uploads can potentially result in remote code execution, posing significant security risks to the website's integrity and confidentiality.

Affected Version(s)

Instant Appointment 0 <= 1.2

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/instant-appoin...
https://plugins.trac.wordpress.org/browser/instant-appoin...

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Random Robbie
.