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6 vulnerabilities found for Simply Schedule Appointments by croixhaug

CVE-2026-104000 (GCVE-0-2026-104000)
Vulnerability from cvelistv5
Published
2026-10-16 05:30
Modified
2026-10-16 15:45
Severity ?
7.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Summary
The Simply Schedule Appointments plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'status' parameter in all versions up to, and including, 1.6.12.35 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The malicious payload is stored unconditionally because debug logging is enabled by default, and the debug-log viewer is accessible to anyone holding the site-wide Support PIN (an HMAC-MD5 of AUTH_SALT displayed in wp-admin), meaning the injected script will execute against the administrator's session during ordinary support or troubleshooting workflows.
References
Impacted products
Vendor Product Version
croixhaug Simply Schedule Appointments Version: 0   ≤ 1.6.12.35
 Create a notification for this product.
Show details on NVD website

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CVE-2026-6723 (GCVE-0-2026-6723)
Vulnerability from cvelistv5
Published
2026-10-10 04:26
Modified
2026-10-11 16:55
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CWE
  • CWE-863 - Incorrect Authorization
Summary
The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Incorrect Authorization in all versions up to, and including, 1.6.11.11. This is due to the appointment update REST API endpoint not restricting which fields can be modified by token-authenticated customers. This makes it possible for unauthenticated attackers to modify admin-controlled fields on that appointment, including faking payment confirmation, reassigning the appointment to another user, and changing the service type.
References
Impacted products
Vendor Product Version
croixhaug Simply Schedule Appointments Version: 0   ≤ 1.6.11.11
 Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2026-91109 (GCVE-0-2026-91109)
Vulnerability from cvelistv5
Published
2026-10-01 03:28
Modified
2026-10-03 15:42
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Summary
The Simply Schedule Appointments plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.6.12.31 via the 'complete_group' parameter due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with subscriber-level access and above, to disclose every co-booker's private per-appointment id_token (exposed as public_token) alongside their PII (name and email address), then use each leaked token to read, overwrite arbitrary appointment meta on, or cancel the co-booker's appointment via the same REST controller. Exploitation requires the attacker to possess a valid id_token for any single appointment within the targeted group booking.
References
Impacted products
Vendor Product Version
croixhaug Simply Schedule Appointments Version: 0   ≤ 1.6.12.31
 Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2026-92245 (GCVE-0-2026-92245)
Vulnerability from cvelistv5
Published
2026-10-01 03:28
Modified
2026-10-03 15:42
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
Summary
The Simply Schedule Appointments plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.6.12.32 via the 'recursive' parameter. This makes it possible for unauthenticated attackers to extract customer PII — including names, email addresses, phone numbers, and custom form field data — stored in appointment records, as well as per-appointment public_token values. The leaked per-appointment public_token values also enable unauthenticated attackers to delete arbitrary appointments via the DELETE /wp-json/ssa/v1/appointments/{id} endpoint, which accepts the token as sole authorization.
References
Impacted products
Vendor Product Version
croixhaug Simply Schedule Appointments Version: 0   ≤ 1.6.12.32
 Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2026-89294 (GCVE-0-2026-89294)
Vulnerability from cvelistv5
Published
2026-09-30 06:40
Modified
2026-09-30 15:28
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-98 - Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')
Summary
The Simply Schedule Appointments plugin for WordPress is vulnerable to Local File Inclusion in all versions up to, and including, 1.6.12.27 via the 'ssa_locale' parameter parameter. This makes it possible for authenticated attackers, with subscriber-level access and above, to include and execute arbitrary .php files on the server, allowing the execution of any PHP code in those files. This can be used to bypass access controls, obtain sensitive data, or achieve code execution in cases where .php file types can be uploaded and included. Notably, exploitation does not require authentication in practice, as the locale filter is installed unconditionally on every request during plugins_loaded and the callback performs no nonce or capability check before returning the raw GET parameter value.
References
Impacted products
Vendor Product Version
croixhaug Simply Schedule Appointments Version: 0   ≤ 1.6.12.27
 Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2026-13358 (GCVE-0-2026-13358)
Vulnerability from cvelistv5
Published
2026-08-16 04:24
Modified
2026-08-17 19:28
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Summary
The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.6.12.10 via the ssa_past_appointments due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with contributor-level access and above, to access appointment records belonging to arbitrary users and harvest the per-appointment ownership tokens (32-character hashes) embedded in the rendered HTML, which can then be used without any authentication to read or modify those appointments including full customer PII such as name, email, phone number, and private notes. The /wp-json/ssa/v1/render-shortcode REST endpoint is registered unconditionally on rest_api_init regardless of whether the Divi theme is installed, and its permission callback only requires current_user_can('edit_posts'), meaning any Contributor-level account is sufficient to trigger this entire exploit chain.
References
Impacted products
Vendor Product Version
croixhaug Simply Schedule Appointments Version: 0   ≤ 1.6.12.10
 Create a notification for this product.
Show details on NVD website

To clipboard 

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