CVE-2024-4288

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin <= 1.6.7.14 - Authenticated (Contributor+) Stored Cross-Site Scripting

MEDIUM
5.4
CVSS Score
Published: May 16, 2024 at 11:05 AM UTC
Updated: June 17, 2026 at 08:01 AM UTC
2 products affected across 1 vendorSimply Schedule AppointmentsAppointment Booking Calendar

Using Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin by croixhaug?

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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘link’ parameter in versions up to, and including, 1.6.7.14 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 1.6.7.14v < 1.6.7.18
Affected range stops below 1.6.7.18, so it looks safe — our inference, not a vendor statement
v ≤ 1.6.7.14

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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