CVE-2026-104898
The Online Scheduling and Appointment Booking System – Bookly plugin for WordPress is vulnerable to…
- Risk score
- 44/100
- CVSS
- 6.8 v3.1
- Exploit chance (30 days)
- 0.3%
- Published
- 10 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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, 28.4 via the 'id, wp_user_id' parameter due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with…
- Affected
- See advisory
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 6.8 medium
References
- https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.4/backend/components/dialogs/staff/edit/Ajax.php#L111
- https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.4/backend/components/dialogs/staff/edit/Ajax.php#L364
- https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.4/backend/components/dialogs/staff/edit/Ajax.php#L93
- https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.4/lib/base/Entity.php#L172
- https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.4/lib/base/Entity.php#L247
- https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.4/lib/base/Request.php#L49
- https://plugins.trac.wordpress.org/changeset?reponame=&new=3730881%40bookly-responsive-appointment-booking-tool%2Ftags%2F28.5&old=3722721%40bookly-responsive-appointment-booking-tool%2Ftags%2F28.4
- https://www.wordfence.com/threat-intel/vulnerabilities/id/1c3cfaa5-00e3-41b6-8f38-cebdd5dec180?source=cve
Original description
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, 28.4 via the 'id, wp_user_id' parameter due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with subscriber-level access and above, to overwrite the WordPress account binding of any Bookly staff record, including those owned by administrators, effectively hijacking a higher-privileged staff member's account association and escalating privileges. Exploitation requires the attacking user to be linked to at least one Bookly staff record, which occurs by default whenever an admin enables the bookly_gen_allow_staff_edit_profile option (active on fresh installs) and links a WordPress user to a staff entry.
Last activity 10 Oct 2026. Patch Forecast updates every hour.