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Vulnerability · Published Jun 14, 2025 · Assigned by Wordfence

CVE-2025-4667Simply Schedule Appointments <= 1.6.8.30 - Authenticated (Contributor+) Stored Cross-Site Scripting via Multiple Shortcodes

Medium 6.4

In plain English

A medium-severity cross-site scripting in Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin from croixhaug. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).

Severity (CVSS 3.1)6.4Medium
Exploit odds (30 days)0.3%top 78.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's ssa_admin_upcoming_appointments, ssa_admin_upcoming_appointments, and ssa_past_appointments shortcodes in all versions up to, and including, 1.6.8.30 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected products (as reported)

VendorProductVersions
croixhaug Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin 0 – through 1.6.8.30

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

References