Known vulnerabilities in Easy Appointment Booking & Scheduling System – Webba Booking Calendar

Free Appointment Booking Plugin 🗓️ Hourly or full-day bookings, booking management, calendar sync, notifications, 5* support = powerful booking syste …

8Reported vulnerabilities

5.3Highest CVSS score

6.4.20Latest version

2,000+Active installs

What to do now

Update Easy Appointment Booking & Scheduling System – Webba Booking Calendar to 6.4.14 or later. 8 of these have a fixed version available. Updating resolves them.

Plugin last updated: August 17, 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-2026-27409	Medium 5.3	0.3%	6.4.13 and earlier	`6.4.14`	July 1, 2026
CVE-2025-54040	Medium 5.3	0.4%	5.1.20 and earlier	`5.1.22`	July 16, 2025
CVE-2021-36847	Medium 4.8	0.6%	Before 4.2.22	`4.2.22`	August 22, 2022
CVE-2025-66530	Medium 4.3	0.3%	6.2.1 and earlier	`6.2.2`	December 15, 2025
CVE-2025-54729	Medium 4.4	0.2%	6.0.5 and earlier	`6.0.6`	August 14, 2025
CVE-2025-54036	Medium 4.3	0.1%	5.1.20 and earlier	`5.1.21`	July 16, 2025
CVE-2024-8432	Medium 4.3	0.4%	Before 5.0.50	`5.0.50`	September 24, 2024
CVE-2023-51354	Medium 4.3	0.2%	4.5.33 and earlier	`5.0`	December 26, 2023

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