EUVD-2026-43396Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Network-accessible unguarded endpoint requires no credentials (PR:N) and no interaction; impact is write-only manipulation of booking data with no confidentiality or availability consequence.
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Lifecycle Timeline
1DescriptionCVE.org
Missing Authorization vulnerability in wpdevart Booking calendar, Appointment Booking System booking-calendar allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Booking calendar, Appointment Booking System: from n/a through <= 3.2.36.
AnalysisAI
Missing authorization in the wpdevart Booking Calendar, Appointment Booking System WordPress plugin (versions through 3.2.36) permits unauthenticated remote attackers to bypass access controls and perform restricted booking-related actions, resulting in unauthorized data modification. The CVSS vector (AV:N/AC:L/PR:N/UI:N) confirms the flaw is trivially reachable over the network with no authentication, though impact is limited to integrity (I:L) with no confidentiality or availability consequence. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The CVSS vector AV:N/AC:L/PR:N/UI:N/S:U confirms no special conditions are required beyond network access to a WordPress installation running the Booking Calendar, Appointment Booking System plugin in versions up to and including 3.2.36. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The NVD-assigned CVSS 5.3 (Medium) reflects a network-accessible, low-complexity, unauthenticated attack path - signals that lower the exploitation barrier significantly. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An unauthenticated attacker enumerates a target WordPress site running plugin version 3.2.36 or earlier and identifies an unprotected booking endpoint - a REST route or admin-ajax action - that lacks a capability check. The attacker sends a crafted HTTP POST request directly to that endpoint, bypassing access control to create, modify, or delete booking records without any credentials. |
| Remediation | Upgrade the Booking Calendar, Appointment Booking System plugin beyond version 3.2.36; the Patchstack advisory at https://patchstack.com/database/Wordpress/Plugin/booking-calendar/vulnerability/wordpress-booking-calendar-appointment-booking-system-plugin-3-2-36-broken-access-control-vulnerability should be consulted for the exact patched release version, as no specific fix version was confirmed in available data. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
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