CVE-2026-92799
Online Scheduling and Appointment Booking System <= 28.2 - Unauthenticated Authorization Bypass via PHP Type Juggling via 'verification_code' Parameter Type Juggling via json_data
- Published
- Updated
- Reserved
- Assigned by
- Wordfence
Description
The 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.
Timeline
ID reserved
By Wordfence
- 9 days later
· 9 days later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| WordfenceCNA (assigner) | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
| NVDNVD · Deferred | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.37% · top 69% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
Affected products
ladela · Online Scheduling and Appointment Booking System – Bookly
- affected ≤ 28.2
References (9)
- https://www.wordfence.com/threat-intel/vulnerabilities/id/d24fa600-7698-4081-92f5-e11606928886?source=cve (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.2/lib/Validator.php#L276 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.2/lib/base/Component.php#L182 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.2/frontend/modules/booking/Ajax.php#L785 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.2/frontend/modules/booking/Ajax.php#L903 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.2/lib/UserBookingData.php#L638 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.2/frontend/modules/booking/Ajax.php#L1447 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.2/frontend/modules/booking/Ajax.php#L15 (opens in a new tab)
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3707284%40bookly-responsive-appointment-booking-tool&new=3707284%40bookly-responsive-appointment-booking-tool (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-92799)Record last updated .