Appointment Hour Booking
Monthly
Unauthenticated attackers can book time slots in the Appointment Hour Booking WordPress plugin (before 1.5.95) that have already reached their configured capacity, because each appointment in a multi-appointment booking submission is not validated against the capacity limit of its own slot. The plugin assigns a CVSS 3.1 base score of 5.3 (AV:N/AC:L/PR:N/UI:N, integrity-only impact), meaning any anonymous visitor can submit a crafted booking form and overwrite or occupy fully booked slots, denying legitimate customers their reservations. Publicly available exploit code exists per WPScan, but the issue is not listed in CISA KEV and EPSS-style mass exploitation signals are absent, so this is best treated as a business-logic abuse and booking-integrity risk rather than a code-execution emergency.
Broken access control in the Appointment Hour Booking WordPress plugin (by Codepeople) versions up to and including 1.5.91 permits unauthenticated remote attackers to bypass authorization checks, resulting in unauthorized integrity and availability impact. Reported by Patchstack and tracked as EUVD-2026-60933, the flaw requires no credentials, no user interaction, and no special configuration - any network-reachable WordPress installation running an affected plugin version is exposed. No public exploit or KEV listing is identified at time of analysis, though the low attack complexity and zero privilege requirement make opportunistic exploitation straightforward if the plugin is widely scanned for.
Price manipulation in the Appointment Hour Booking WordPress plugin (all versions before 1.5.88) allows any unauthenticated visitor to submit a crafted booking request with an attacker-controlled price - including zero or negative amounts - that the server accepts without validation and stores as authoritative, corrupting both booking and payment records. A publicly available proof-of-concept has been disclosed via WPScan, though the EPSS score of 0.14% (3rd percentile) indicates minimal observed exploitation at this time. Vendor-released patch version 1.5.88 is available and resolves the missing server-side price validation.
Stored Cross-Site Scripting in the Appointment Hour Booking WordPress plugin (versions <= 1.5.86) allows authenticated contributors to inject and persist malicious JavaScript payloads that execute in the browsers of higher-privileged users, such as site administrators, who view the affected content. The CVSS vector (PR:L/UI:R/S:C) confirms this is a contributor-tier stored XSS with scope change, meaning the impact propagates beyond the attacker's own session into the administrative context. No active exploitation has been confirmed via CISA KEV, and no public exploit code has been identified at time of analysis.
The Appointment Hour Booking plugin for WordPress is vulnerable to CAPTCHA bypass in versions up to, and including, 1.3.72. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
The Appointment Hour Booking plugin for WordPress is vulnerable to iFrame Injection via the ‘email’ or general field parameters in versions up to, and including, 1.3.72 due to insufficient input. Rated high severity (CVSS 7.2), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.
The Appointment Hour Booking Plugin for WordPress is vulnerable to CSV Injection in versions up to, and including, 1.3.72. Rated medium severity (CVSS 5.8), this vulnerability is remotely exploitable, no authentication required.
Missing Authorization vulnerability in Appointment Hour Booking plugin <= 1.3.71 on WordPress. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
The Appointment Hour Booking WordPress plugin before 1.3.56 does not sanitise and escape a settings of its Calendar fields, which could allow high privilege users to perform Cross-Site Scripting. Rated medium severity (CVSS 4.8), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
The Appointment Hour Booking WordPress plugin before 1.3.17 does not properly sanitize values used when creating new calendars. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
The Appointment Hour Booking WordPress plugin before 1.3.16 does not escape some of the Calendar Form settings, allowing high privilege users to perform Stored Cross-Site Scripting attacks even when. Rated medium severity (CVSS 4.8), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
The Appointment Hour Booking plugin 1.1.44 for WordPress allows XSS via the E-mail field, as demonstrated by email_1. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Unauthenticated attackers can book time slots in the Appointment Hour Booking WordPress plugin (before 1.5.95) that have already reached their configured capacity, because each appointment in a multi-appointment booking submission is not validated against the capacity limit of its own slot. The plugin assigns a CVSS 3.1 base score of 5.3 (AV:N/AC:L/PR:N/UI:N, integrity-only impact), meaning any anonymous visitor can submit a crafted booking form and overwrite or occupy fully booked slots, denying legitimate customers their reservations. Publicly available exploit code exists per WPScan, but the issue is not listed in CISA KEV and EPSS-style mass exploitation signals are absent, so this is best treated as a business-logic abuse and booking-integrity risk rather than a code-execution emergency.
Broken access control in the Appointment Hour Booking WordPress plugin (by Codepeople) versions up to and including 1.5.91 permits unauthenticated remote attackers to bypass authorization checks, resulting in unauthorized integrity and availability impact. Reported by Patchstack and tracked as EUVD-2026-60933, the flaw requires no credentials, no user interaction, and no special configuration - any network-reachable WordPress installation running an affected plugin version is exposed. No public exploit or KEV listing is identified at time of analysis, though the low attack complexity and zero privilege requirement make opportunistic exploitation straightforward if the plugin is widely scanned for.
Price manipulation in the Appointment Hour Booking WordPress plugin (all versions before 1.5.88) allows any unauthenticated visitor to submit a crafted booking request with an attacker-controlled price - including zero or negative amounts - that the server accepts without validation and stores as authoritative, corrupting both booking and payment records. A publicly available proof-of-concept has been disclosed via WPScan, though the EPSS score of 0.14% (3rd percentile) indicates minimal observed exploitation at this time. Vendor-released patch version 1.5.88 is available and resolves the missing server-side price validation.
Stored Cross-Site Scripting in the Appointment Hour Booking WordPress plugin (versions <= 1.5.86) allows authenticated contributors to inject and persist malicious JavaScript payloads that execute in the browsers of higher-privileged users, such as site administrators, who view the affected content. The CVSS vector (PR:L/UI:R/S:C) confirms this is a contributor-tier stored XSS with scope change, meaning the impact propagates beyond the attacker's own session into the administrative context. No active exploitation has been confirmed via CISA KEV, and no public exploit code has been identified at time of analysis.
The Appointment Hour Booking plugin for WordPress is vulnerable to CAPTCHA bypass in versions up to, and including, 1.3.72. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
The Appointment Hour Booking plugin for WordPress is vulnerable to iFrame Injection via the ‘email’ or general field parameters in versions up to, and including, 1.3.72 due to insufficient input. Rated high severity (CVSS 7.2), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.
The Appointment Hour Booking Plugin for WordPress is vulnerable to CSV Injection in versions up to, and including, 1.3.72. Rated medium severity (CVSS 5.8), this vulnerability is remotely exploitable, no authentication required.
Missing Authorization vulnerability in Appointment Hour Booking plugin <= 1.3.71 on WordPress. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
The Appointment Hour Booking WordPress plugin before 1.3.56 does not sanitise and escape a settings of its Calendar fields, which could allow high privilege users to perform Cross-Site Scripting. Rated medium severity (CVSS 4.8), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
The Appointment Hour Booking WordPress plugin before 1.3.17 does not properly sanitize values used when creating new calendars. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
The Appointment Hour Booking WordPress plugin before 1.3.16 does not escape some of the Calendar Form settings, allowing high privilege users to perform Stored Cross-Site Scripting attacks even when. Rated medium severity (CVSS 4.8), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
The Appointment Hour Booking plugin 1.1.44 for WordPress allows XSS via the E-mail field, as demonstrated by email_1. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.