Simply Schedule Appointments <= 1.6.12.23 - Cross-Site Request Forgery

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4.3
Cross-Site Request Forgery (CSRF)
CVE CVE-2026-84764
CVSS 4.3 (Medium)
Publicly Published September 2, 2026
Last Updated September 9, 2026
Researcher Anthony Green of Greenhat Security

Description

The Simply Schedule Appointments plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.6.12.23. This is due to missing or incorrect nonce validation on a function. This makes it possible for unauthenticated attackers to perform an unauthorized action via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

References

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Vulnerability Details for Simply Schedule Appointments

Simply Schedule Appointments

Software Type Plugin
Software Slug simply-schedule-appointments (view on wordpress.org)
Patched? Yes
Remediation Update to version 1.6.12.24, or a newer patched version
Affected Version
  • <= 1.6.12.23
Patched Version
  • 1.6.12.24

Recent vulnerabilities in Simply Schedule Appointments

Appointment Booking Calendar <= 1.6.11.11 - Incorrect Authorization to Unauthenticated Sensitive Field Modification via Appointment Public Token
5.3
CVE-2026-6723
Oct 9, 2026
Researcher: awhacken
Simply Schedule Appointments <= 1.6.12.31 - Insecure Direct Object Reference to Authenticated (Subscriber+) Sensitive Information Disclosure via 'complete_group' Parameter
6.5
CVE-2026-91109
Sep 30, 2026
Researcher: jtb75
Simply Schedule Appointments <= 1.6.12.32 - Missing Authorization to Unauthenticated Sensitive Information Exposure and Arbitrary Appointment Deletion via 'recursive' Parameter on the appointment_types REST Endpoint via Public Nonce
7.5
CVE-2026-92245
Sep 30, 2026
Researcher: Md. Moniruzzaman Prodhan (NomanProdhan)
Simply Schedule Appointments <= 1.6.12.27 - Authenticated (Subscriber+) Local File Inclusion via 'ssa_locale' Parameter
7.5
CVE-2026-89294
Sep 29, 2026
Researcher: crow
Simply Schedule Appointments <= 1.6.12.31 - Unauthenticated Insecure Direct Object Reference
5.3
CVE-2026-94673
Sep 24, 2026
Researcher: rpgsec
Simply Schedule Appointments <= 1.6.12.29 - Missing Authorization
5.3
CVE-2026-94074
Sep 24, 2026
Researcher: Mor Golan
Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin <= 1.6.12.10 - Authenticated (Contributor+) Insecure Direct Object Reference to Sensitive Information Exposure
6.5
CVE-2026-13358
Aug 15, 2026
Researcher: Michael Iden (Mickhat)
Simply Schedule Appointments <= 1.6.12.16 - Authenticated (Team Member+) Information Exposure
4.3
CVE-2026-16541
Aug 13, 2026
Researcher: Yaswanth Reddy Sunkara
Simply Schedule Appointments < 1.6.12.6 - Unauthenticated Insecure Direct Object Reference
5.3
CVE-2026-16540
Aug 6, 2026
Researcher: Suleyman Huseynov
Simply Schedule Appointments <= 1.6.12.10 - Unauthenticated SQL Injection
7.5
CVE-2026-65508
Jul 28, 2026
Researcher: daroo
# Title CVE ID CVSS Researchers Date
1 Appointment Booking Calendar <= 1.6.11.11 - Incorrect Authorization to Unauthenticated Sensitive Field Modification via Appointment Public Token CVE-2026-6723 5.3 awhacken October 9, 2026
2 Simply Schedule Appointments <= 1.6.12.31 - Insecure Direct Object Reference to Authenticated (Subscriber+) Sensitive Information Disclosure via 'complete_group' Parameter CVE-2026-91109 6.5 jtb75 September 30, 2026
3 Simply Schedule Appointments <= 1.6.12.32 - Missing Authorization to Unauthenticated Sensitive Information Exposure and Arbitrary Appointment Deletion via 'recursive' Parameter on the appointment_types REST Endpoint via Public Nonce CVE-2026-92245 7.5 Md. Moniruzzaman Prodhan (NomanProdhan) September 30, 2026
4 Simply Schedule Appointments <= 1.6.12.27 - Authenticated (Subscriber+) Local File Inclusion via 'ssa_locale' Parameter CVE-2026-89294 7.5 crow September 29, 2026
5 Simply Schedule Appointments <= 1.6.12.31 - Unauthenticated Insecure Direct Object Reference CVE-2026-94673 5.3 rpgsec September 24, 2026
6 Simply Schedule Appointments <= 1.6.12.29 - Missing Authorization CVE-2026-94074 5.3 Mor Golan September 24, 2026
7 Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin <= 1.6.12.10 - Authenticated (Contributor+) Insecure Direct Object Reference to Sensitive Information Exposure CVE-2026-13358 6.5 Michael Iden (Mickhat) August 15, 2026
8 Simply Schedule Appointments <= 1.6.12.16 - Authenticated (Team Member+) Information Exposure CVE-2026-16541 4.3 Yaswanth Reddy Sunkara August 13, 2026
9 Simply Schedule Appointments < 1.6.12.6 - Unauthenticated Insecure Direct Object Reference CVE-2026-16540 5.3 Suleyman Huseynov August 6, 2026
10 Simply Schedule Appointments <= 1.6.12.10 - Unauthenticated SQL Injection CVE-2026-65508 7.5 daroo July 28, 2026
View more vulnerabilities in this software package View more vulnerabilities

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