Authorization bypass in ladela Online Scheduling and Appointment Booking System – Bookly
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-639.
Summary
The Online Scheduling and Appointment Booking System – Bookly plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 28.1 via the 'conversation_id' parameter due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to read the full AI booking conversation transcript of any customer — leaking names, email addresses, phone numbers, and appointment details echoed by the assistant — and inject arbitrary messages into any victim conversation that are subsequently replayed to the Cloud AI worker along with the full private history. Because AI conversations are stored with no owner, user, or session identifier and conversation IDs are sequential integers, an unauthenticated attacker can enumerate all customer conversations simply by incrementing the conversation_id parameter.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-89063
- 2026-10-03 Alias added: GHSA-f895-wc4g-97xv
References
Other 6
- https://www.wordfence.com/threat-intel/vulnerabilities/id/b6af015f-f954-4afb-9d65-56176f73672f?source=cve
- https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.1/frontend/modules/ai/Ajax.php#L215
- https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.1/frontend/modules/ai/Ajax.php#L212
- https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.1/frontend/modules/ai/Ajax.php#L60
- https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.1/frontend/modules/ai/Ajax.php#L38
- https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.1/lib/base/Component.php#L67
More ladela vulnerabilities
- TI-2026-62969 Authorization bypass in ladela Online Scheduling and Appointment Booking System – Bookly CVSS 3.1CRITICAL 9.1
- TI-2026-12256 Online Scheduling and Appointment Booking System <= 27.5 - Unauthenticated SQL Injection CVSS 3.1HIGH 7.5
- TI-2026-11363 Cross-site scripting in ladela Online Scheduling and Appointment Booking System – Bookly CVSS 3.1HIGH 7.2
- TI-2026-04830 Cross-site scripting in ladela Online Scheduling and Appointment Booking System – Bookly CVSS 3.1HIGH 7.2
- TI-2026-70141 PHP object injection in Bookly WordPress scheduling plugin CVSS 3.1HIGH 7.2
- TI-2026-70266 Bookly WordPress plugin lets subscribers escalate privileges CVSS 3.1MEDIUM 6.8
Sources
- CVE-2026-89063 · CVE Program
- CVE-2026-89063 · NVD
- FIRST EPSS
- GHSA-f895-wc4g-97xv · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences