Online Scheduling and Appointment Booking System <= 28.2 - Unauthenticated Authorization Bypass via PHP Type Juggling via 'verification_code' Parameter Type Juggling via json_data

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-92799
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-25 07:16:55 UTC
Updated2026-09-25 13:08:26 UTC
DescriptionThe Online Scheduling and Appointment Booking System – Bookly plugin for WordPress is vulnerable to Authorization Bypass via PHP Type Juggling in all versions up to, and including, 28.2. This is due to the `postValidateCustomer()` function using a loose PHP inequality operator (`!=`) to compare the session-stored one-time verification code against the attacker-supplied `verification_code` parameter — a flaw that is further exposed by the booking AJAX controller registering all its methods as `wp_ajax_nopriv_` handlers and unconditionally overriding `csrfTokenValid()` to return true, leaving the endpoint both unauthenticated and CSRF-unprotected. This makes it possible for unauthenticated attackers to bypass the phone/email ownership verification step and overwrite the name, email, phone, and address fields of any arbitrary existing Bookly customer record, redirecting that customer's booking notifications to attacker-controlled contact details. The bypass is achievable because the `json_data` input channel decodes input via `json_decode()`, which preserves real PHP types and causes the `wp_kses` filter to leave non-string values such as the JSON boolean `true` untouched; submitting `true` as the `verification_code` satisfies the loose comparison against the session's non-zero integer code (generated by `mt_rand(100000, 999999)`), causing `true != <non-zero int>` to evaluate as `false` and the guard to be bypassed.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS: 0.003150000 probability, percentile 0.218960000 (date 2026-09-27)

Problem Types: CWE-285 | CWE-285 CWE-285 Improper Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Ladela Online Scheduling And Appointment Booking System Bookly affected 28.2 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.2/... [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/d24fa600-7698-4081-92f5-e1160... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.2/... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.2/... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.2/... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.2/... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.2/... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.2/... [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: crow (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-09-16T19:59:49.000ZVendor Notified
CNA2026-09-24T18:11:38.000ZDisclosed

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