WP Security CheckVulnerability data as of October 22, 2026

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!

32Reported vulnerabilities
9.1Highest CVSS score
28.0Latest version
60,000+Active installs

What to do now

Update Online Scheduling and Appointment Booking System – Bookly to 28.3 or later. 32 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.

CVESeverityExploit probability
next 30 days		 Affected versionsFixed inPublished
CVE-2023-4691 High 7.2 0.9% Before 22.4 22.4 October 16, 2023
CVE-2018-6891 Medium 6.1 1.0% Before 14.5 14.5 February 11, 2018
CVE-2021-24930 Medium 5.4 0.6% Before 20.3.1 20.3.1 December 6, 2021
CVE-2026-93399 Critical 9.1 0.4% 0 to 28.2 (inclusive) 28.3 September 25, 2026
CVE-2023-5209 Medium 4.8 0.5% 22.4.1 and earlier 22.5 November 27, 2023
CVE-2023-26526 High 8.1 0.9% 21.7.1 and earlier 21.8 May 11, 2023
CVE-2026-89063 High 7.5 1.6% 0 to 28.1 (inclusive) 28.2 September 16, 2026
CVE-2026-86841 High 7.5 0.2% 23.2 to 28.2 (inclusive) 28.3 September 25, 2026
CVE-2026-13395 High 7.5 0.4% Before 27.8 27.8 August 3, 2026
CVE-2026-14516 High 7.5 0.5% 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-2026-12626 High 7.2 0.3% 0 to 28.2 (inclusive) 28.3 October 10, 2026
CVE-2026-13424 High 7.2 0.6% 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 0.3% 0 to 27.2 (inclusive) 27.3 June 13, 2026
CVE-2026-104898 Medium 6.8 0.3% 0 to 28.4 (inclusive) 28.5 October 10, 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 0.3% 26.7 and earlier 26.8 March 20, 2026
CVE-2023-1172 Medium 6.1 0.5% Before 21.5.1 21.5.1 March 17, 2023
CVE-2026-103365 Medium 5.3 0.3% 0 to 28.4 (inclusive) 28.5 October 10, 2026
CVE-2026-86838 Medium 5.3 0.2% 0 up to (but not including) 28.3 28.3 September 28, 2026
CVE-2026-86837 Medium 5.3 0.2% 0 up to (but not including) 28.3 28.3 September 25, 2026
CVE-2026-92799 Medium 5.3 0.3% 0 to 28.2 (inclusive) 28.3 September 25, 2026
CVE-2026-96348 Medium 5.3 0.3% 28.2 and earlier 28.3 September 24, 2026
CVE-2026-91847 Medium 5.3 0.2% 28.1 and earlier 28.2 September 17, 2026
CVE-2026-2520 Medium 5.4 0.2% 0 to 27.2 (inclusive) 27.3 September 8, 2026
CVE-2026-42667 Medium 5.3 0.4% 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-2023-1159 Medium 4.8 0.4% 21.7 and earlier 21.8 June 2, 2023
CVE-2026-86839 Medium 4.3 0.2% 28.2 and earlier 28.3 September 25, 2026
CVE-2026-96347 Medium 4.3 0.3% 28.2 and earlier 28.3 September 24, 2026
CVE-2026-12905 Medium 4.3 0.4% 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.