CVE-2022-2374: Simply Schedule Appointments < 1.5.7.7 - Admin+ Stored Cross-Site Scripting

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-08-29 · updated 2026-06-17
Weakness: CWE-79

Description

The Simply Schedule Appointments WordPress plugin before 1.5.7.7 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)

Affected products

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin: before 1.5.7.7 — fixed in 1.5.7.7

How to fix

Upgrade to a fixed version: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin 1.5.7.7. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2022-2374 or the next vulnerability affects your stack