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Simply Schedule Appointments CVE-2024-4288

MEDIUM
Cross-site Scripting (XSS) (CWE-79)
2024-05-16 security@wordfence.com
6.4
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
6.4 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

2
Patch released
Apr 08, 2026 - 18:22 nvd
Patch available
CVE Published
May 16, 2024 - 11:15 nvd
MEDIUM 6.4

DescriptionCVE.org

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.

AnalysisAI

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. Rated medium severity (CVSS 6.4), this vulnerability is remotely exploitable, low attack complexity. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.

Technical ContextAI

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. 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 products include: Nsquared Simply Schedule Appointments.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.

CVE-2024-7129 HIGH POC
7.2 Sep 13

The Appointment Booking Calendar WordPress plugin before 1.6.7.43 does not escape template syntax provided via user inpu

CVE-2026-39493 CRITICAL
9.3 Jun 15

Unauthenticated SQL injection in the Simply Schedule Appointments WordPress plugin (versions ≤ 1.6.9.27) allows remote a

CVE-2022-2373 MEDIUM POC
5.3 Aug 29

The Simply Schedule Appointments WordPress plugin before 1.5.7.7 is missing authorisation in a REST endpoint, allowing u

CVE-2024-2341 HIGH
8.8 Apr 09

The Appointment Booking Calendar - Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to SQL

CVE-2024-2342 HIGH
8.8 Apr 09

The Appointment Booking Calendar - Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to SQL

CVE-2024-7877 MEDIUM POC
4.8 Nov 05

The Appointment Booking Calendar - Simply Schedule Appointments Booking Plugin WordPress plugin before 1.6.7.55 does not

CVE-2024-7876 MEDIUM POC
4.8 Nov 05

The Appointment Booking Calendar - Simply Schedule Appointments Booking Plugin WordPress plugin before 1.6.7.55 does not

CVE-2022-2374 MEDIUM POC
4.8 Aug 29

The Simply Schedule Appointments WordPress plugin before 1.5.7.7 does not sanitise and escape some of its settings, whic

CVE-2026-39495 HIGH
8.5 Apr 08

Blind SQL injection in NSquared Simply Schedule Appointments WordPress plugin versions ≤1.6.9.27 allows authenticated at

CVE-2023-50851 HIGH
7.6 Dec 28

Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in N Squared Appointm

CVE-2026-42384 HIGH
7.5 Jun 15

Unauthenticated sensitive data exposure in the Simply Schedule Appointments WordPress plugin versions prior to 1.6.11.2

CVE-2026-39447 HIGH
7.1 Jun 15

Unauthenticated reflected/stored cross-site scripting in the Simply Schedule Appointments WordPress plugin (versions ≤ 1

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CVE-2024-4288 vulnerability details – vuln.today

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