Simply Schedule Appointments <= 1.6.12.10 - Missing Authorization to Authenticated (Contributor+) Sensitive Data Disclosure

Wordfence Intelligence   >   Vulnerability Database   >   Simply Schedule Appointments <= 1.6.12.10 - Missing Authorization to Authenticated (Contributor+) Sensitive Data Disclosure
4.3
Incorrect Authorization
CVE CVE-2026-15254
CVSS 4.3 (Medium)
Publicly Published July 23, 2026
Last Updated August 21, 2026
Researcher Meher Sudhakar Abbireddi

Description

The Simply Schedule Appointments plugin for WordPress is vulnerable to unauthorized access in versions up to, and including, 1.6.12.10. This is due to missing capability checks on user-controlled shortcode attributes in the ssa_admin_upcoming_appointments shortcode handler, allowing non-managers to bypass staff scoping and read arbitrary appointment records. This makes it possible for authenticated attackers, with contributor-level access and above, to view other customers' appointment data by embedding admin shortcodes with arbitrary customer or staff scope parameters in a post or page.

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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 1.6.12.11, or a newer patched version
Affected Version
  • <= 1.6.12.10
Patched Version
  • 1.6.12.11

Recent vulnerabilities in Simply Schedule Appointments

Simply Schedule Appointments <= 1.6.12.35 - Unauthenticated Stored Cross-Site Scripting via 'status' Parameter via /wp-json/ssa/v1/appointments/{id}
7.2
CVE-2026-104000
Oct 15, 2026
Researcher: Kuba
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
Simply Schedule Appointments <= 1.6.12.23 - Cross-Site Request Forgery
4.3
CVE-2026-84764
Sep 2, 2026
Researcher: Anthony Green of Greenhat Security
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
# Title CVE ID CVSS Researchers Date
1 Simply Schedule Appointments <= 1.6.12.35 - Unauthenticated Stored Cross-Site Scripting via 'status' Parameter via /wp-json/ssa/v1/appointments/{id} CVE-2026-104000 7.2 Kuba October 15, 2026
2 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
3 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
4 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
5 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
6 Simply Schedule Appointments <= 1.6.12.31 - Unauthenticated Insecure Direct Object Reference CVE-2026-94673 5.3 rpgsec September 24, 2026
7 Simply Schedule Appointments <= 1.6.12.29 - Missing Authorization CVE-2026-94074 5.3 Mor Golan September 24, 2026
8 Simply Schedule Appointments <= 1.6.12.23 - Cross-Site Request Forgery CVE-2026-84764 4.3 Anthony Green of Greenhat Security September 2, 2026
9 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
10 Simply Schedule Appointments <= 1.6.12.16 - Authenticated (Team Member+) Information Exposure CVE-2026-16541 4.3 Yaswanth Reddy Sunkara August 13, 2026
View more vulnerabilities in this software package View more vulnerabilities

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