Known vulnerabilities in Online Scheduling and Appointment Booking System – Bookly

Appointment booking system for WordPress — schedule appointments, manage calendars, send reminders, take payments. Start booking today!

13Reported vulnerabilities

8.1Highest CVSS score

28.0Latest version

60,000+Active installs

What to do now

Update Online Scheduling and Appointment Booking System – Bookly to 28.0 or later. 13 of these have a fixed version available. Updating resolves them.

Plugin last updated: August 7, 2026 / Tested up to WordPress: 7.0.4 / View on wordpress.org

Reported vulnerabilities

Ordered by how urgently they need attention — whether a vulnerability is actually being exploited, and how likely exploitation is, rather than CVSS severity alone.

CVE	Severity	Exploit probability next 30 days	Affected versions	Fixed in	Published
CVE-2018-6891	Medium 6.1	1.0%	Before 14.5	`14.5`	February 11, 2018
CVE-2023-26526	High 8.1	0.9%	21.7.1 and earlier	`21.8`	May 11, 2023
CVE-2026-13395	High 7.5	0.3%	Before 27.8	`27.8`	August 3, 2026
CVE-2026-14516	High 7.5	0.3%	0 to 27.5 (inclusive)	`27.8`	July 28, 2026
CVE-2026-61949	High 7.5	0.4%	27.7 and earlier	`27.8`	July 16, 2026
CVE-2026-13424	High 7.2	0.3%	0 to 27.7 (inclusive)	`28.0`	August 16, 2026
CVE-2026-61944	High 7.2	0.3%	27.7 and earlier	`27.8`	July 16, 2026
CVE-2026-5513	High 7.2	0.4%	0 to 27.2 (inclusive)	`27.3`	June 13, 2026
CVE-2024-5584	Medium 6.4	0.3%	0 to 23.2 (inclusive)	`23.3`	June 11, 2024
CVE-2026-32540	Medium 6.1	0.1%	26.7 and earlier	`26.8`	March 20, 2026
CVE-2026-42667	Medium 5.3	0.3%	27.4 and earlier	`27.5`	May 10, 2026
CVE-2026-2519	Medium 5.3	0.5%	0 to 27.0 (inclusive)	`27.1`	April 9, 2026
CVE-2026-12905	Medium 4.3	0.3%	0 to 27.7 (inclusive)	`28.0`	August 16, 2026

Sources: vulnerability records from NVD, exploitation from CISA KEV, exploit probability from EPSS. Affected versions come from CPE ranges or from the reporting CNA.