Read the docs
TI-2026-59373 Aliases CVE-2026-86841GHSA-ggx5-r53p-pf97

Bookly 23.2 - 28.2 - Bookly Administrator+ PHP Object Injection via Diagnostics Advanced Options

Priority LOW 21CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
Low · Low · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-502.

Summary

The Online Scheduling and Appointment Booking System WordPress plugin before 28.3 does not prevent deserialization of untrusted input and does not correctly restrict a privileged maintenance feature to administrators, allowing users granted a custom booking-management capability, which an administrator must explicitly assign, to inject arbitrary PHP objects, overwrite privileged site options, and read stored integration secrets.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00222 12th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Online Scheduling and Appointment Booking System (Unknown): 28.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
UnknownOnline Scheduling and Appointment Booking System23.2 to before 28.328.3Patch availableCNA
  • Online Scheduling and Appointment Booking System VendorUnknown Affected 23.2 to before 28.3 Fixed in 28.3 Patch available CNA

Remediation

  • Fix · CNA Online Scheduling and Appointment Booking System (Unknown) Fixed in 28.3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Online Scheduling and Appointment Booking System 28.3

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-59371 Bookly < 28.3 - Staff+ Appointment and Payment Disclosure, Modification and Deletion via IDORPriority LOW 17
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-86841
  2. 2026-10-03 Alias added: GHSA-ggx5-r53p-pf97

References

Exploit 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences