SQL Injection Threat in Appointment Booking Calendar Plugin for WordPress
CVE-2026-3658

7.5HIGH

Key Information:

Vendor

WordPress
Status
Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Vendor
CVE Published:
19 March 2026

What is CVE-2026-3658?

The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin for WordPress has a vulnerability that allows unauthenticated attackers to perform SQL injection via the 'fields' parameter. This occurs due to insufficient escaping of user-supplied input and inadequate preparation of the SQL query. Exploiting this vulnerability can enable attackers to insert additional SQL queries, potentially leading to the exposure of sensitive data such as usernames, email addresses, and password hashes from the database, jeopardizing user privacy and site integrity.

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Affected Version(s)

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin * <= 1.6.10.0

References

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

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

momopon1415
JSON
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