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    2 vulnerabilities found for Simply Schedule Appointments by croixhaug

    CVE-2026-13358 (GCVE-0-2026-13358)

    Vulnerability from nvd – Published: 2026-08-16 04:24 – Updated: 2026-08-17 19:28
    VLAI
    Title
    Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin <= 1.6.12.10 - Authenticated (Contributor+) Insecure Direct Object Reference to Sensitive Information Exposure
    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.
    Severity
    6.5 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-17 19:25 UTC
    CWE
    • CWE-639 - Authorization Bypass Through User-Controlled Key
    Assigner
    References
    Impacted products
    Vendor Product Version
    croixhaug Simply Schedule Appointments Affected: 0 , ≤ 1.6.12.10 (semver)
    		Create a notification for this product.
    Credits
    Michael Iden (Mickhat)
    Show details on NVD website
    To clipboard 

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                "timestamp": "2026-08-17T19:25:41.097270Z",
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        "title": "CISA ADP Vulnrichment"
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    CVE-2026-13358 (GCVE-0-2026-13358)

    Vulnerability from cvelistv5 – Published: 2026-08-16 04:24 – Updated: 2026-08-17 19:28
    VLAI
    Title
    Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin <= 1.6.12.10 - Authenticated (Contributor+) Insecure Direct Object Reference to Sensitive Information Exposure
    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.
    Severity
    6.5 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-17 19:25 UTC
    CWE
    • CWE-639 - Authorization Bypass Through User-Controlled Key
    Assigner
    References
    Impacted products
    Vendor Product Version
    croixhaug Simply Schedule Appointments Affected: 0 , ≤ 1.6.12.10 (semver)
    		Create a notification for this product.
    Credits
    Michael Iden (Mickhat)
    Show details on NVD website
    To clipboard 

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