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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

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-2026-16540 HIGH POC
7.5 Aug 02

Simply Schedule Appointments WordPress plugin before 1.6.12.6 exposes all site appointment records to unauthenticated us

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-2026-15254 MEDIUM POC
6.5 Aug 03

Broken access control in Simply Schedule Appointments WordPress plugin before 1.6.12.11 exposes all customer appointment

CVE-2026-13400 MEDIUM POC
6.1 Jul 27

Stored Cross-Site Scripting in Simply Schedule Appointments up to 1.6.12.2 allows unauthenticated attackers to inject ar

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-2026-65508 CRITICAL
9.3 Aug 06

Unauthenticated SQL injection in the Simply Schedule Appointments WordPress plugin (versions up to and including 1.6.12.

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-2026-84764 HIGH
8.8 Sep 02

Cross-site request forgery in the Simply Schedule Appointments WordPress plugin (versions ≤ 1.6.12.23) enables an unauth

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

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CVE-2024-4288 vulnerability details – vuln.today

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