Freemius SDK <= 2.5.9 - Reflected Cross-Site Scripting via fs_request_get

6.1
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2023-33999
CVSS 6.1 (Medium)
Publicly Published July 18, 2023
Last Updated April 8, 2024
Researcher Rafie Muhammad - Awesome Motive, Inc.

Description

The Freemius SDK for WordPress is vulnerable to Reflected Cross-Site Scripting via the ‘fs_request_get’ function in versions up to, and including, 2.5.9 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.

References

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Vulnerability Details for Bookit — Booking & Appointment Calendar

Software Type Plugin
Software Slug bookit (view on wordpress.org)
Patched? Yes
Remediation Update to version 2.4.0, or a newer patched version
Affected Version
  • <= 2.3.9
Patched Version
  • 2.4.0

1-20 of 757 other affected software packages

Search affected software packages

Software Type Plugin
Software Slug 1-click-close-store (view on wordpress.org)
Patched? No
Remediation No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
Affected Version
  • 1.1.0
Software Type Plugin
Software Slug 2mb-autocode (view on wordpress.org)
Patched? Yes
Remediation Update to version 1.2.6, or a newer patched version
Affected Version
  • <= 1.2.5
Patched Version
  • 1.2.6
Software Type Plugin
Software Slug 3d-viewer (view on wordpress.org)
Patched? Yes
Remediation Update to version 1.3.4, or a newer patched version
Affected Version
  • <= 1.3.3
Patched Version
  • 1.3.4
Software Type Plugin
Software Slug 404-to-301 (view on wordpress.org)
Patched? Yes
Remediation Update to version 3.0.6, or a newer patched version
Affected Version
  • <= 3.0.5
Patched Version
  • 3.0.6
Software Type Plugin
Software Slug setka-editor (view on wordpress.org)
Patched? No
Remediation No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
Affected Version
  • 1.9.1 - 2.1.19
Software Type Plugin
Software Slug a-staff (view on wordpress.org)
Patched? No
Remediation No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
Affected Version
  • 1.2 - 1.2.2
Software Type Plugin
Software Slug auto-date-year-month (view on wordpress.org)
Patched? No
Remediation No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
Affected Version
  • 1.0.1 - 1.1.2
Software Type Plugin
Software Slug acf-for-woocommerce-product (view on wordpress.org)
Patched? No
Remediation No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
Affected Version
  • 0.1 - 1.8.1
Software Type Plugin
Software Slug acf-vc-integrator (view on wordpress.org)
Patched? Yes
Remediation Update to version 1.3.1, or a newer patched version
Affected Version
  • <= 1.3.0
Patched Version
  • 1.3.1
Software Type Plugin
Software Slug pramadillo-activecampaign-email-preference-center (view on wordpress.org)
Patched? Yes
Remediation Update to version 2.0.12, or a newer patched version
Affected Version
  • 1.0.0 - 2.0.11
Patched Version
  • 2.0.12
Software Type Plugin
Software Slug activity-log-mainwp (view on wordpress.org)
Patched? Yes
Remediation Update to version 2.0.0, or a newer patched version
Affected Version
  • <= 1.7.1
Patched Version
  • 2.0.0
Software Type Plugin
Software Slug adblock-notify-by-bweb (view on wordpress.org)
Patched? No
Remediation No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
Affected Version
  • 2.0.8 - 2.4.0
Software Type Plugin
Software Slug addon-elements-for-elementor-page-builder (view on wordpress.org)
Patched? Yes
Remediation Update to version 1.12, or a newer patched version
Affected Version
  • <= 1.11.16
Patched Version
  • 1.12
Software Type Plugin
Software Slug adminify (view on wordpress.org)
Patched? Yes
Remediation Update to version 3.1.5, or a newer patched version
Affected Version
  • 1.0.0 - 3.1.3
Patched Version
  • 3.1.5
Software Type Plugin
Software Slug advanced-classifieds-and-directory-pro (view on wordpress.org)
Patched? Yes
Remediation Update to version 2.1.2, or a newer patched version
Affected Version
  • <= 2.1.1
Patched Version
  • 2.1.2
Software Type Plugin
Software Slug advanced-database-replacer (view on wordpress.org)
Patched? No
Remediation No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
Affected Version
  • 1.0.0 - 1.1.0
Software Type Plugin
Software Slug advanced-form-integration (view on wordpress.org)
Patched? Yes
Remediation Update to version 1.69.1, or a newer patched version
Affected Version
  • <= 1.69.0
Patched Version
  • 1.69.1
Software Type Plugin
Software Slug advance-menu-manager (view on wordpress.org)
Patched? Yes
Remediation Update to version 3.0.6, or a newer patched version
Affected Version
  • 3.0.1 - 3.0.5
Patched Version
  • 3.0.6
Software Type Plugin
Software Slug advanced-page-visit-counter (view on wordpress.org)
Patched? Yes
Remediation Update to version 7.1.1, or a newer patched version
Affected Version
  • 3.0 - 7.1.0
Patched Version
  • 7.1.1
Software Type Plugin
Software Slug add-expires-headers (view on wordpress.org)
Patched? Yes
Remediation Update to version 2.8.0, or a newer patched version
Affected Version
  • 2.0 - 2.7.3
Patched Version
  • 2.8.0

Recent vulnerabilities in Bookit — Booking & Appointment Calendar

# Title CVE ID CVSS Researchers Date
1 Bookit <= 2.6.0.4 - Missing Authorization CVE-2026-89007 4.3 Hieus September 16, 2026
2 Bookit <= 2.6.0.4 - Authenticated (Bookit Staff+) Information Exposure CVE-2026-89008 4.3 Farid Narimanov September 16, 2026
3 Bookit — Booking & Appointment Calendar < 2.6.0.1 - Unauthenticated Information Exposure CVE-2026-88995 5.3 Philipp Doblhofer September 13, 2026
4 Bookit — Booking & Appointment Calendar <= 2.6.0.3 - Missing Authorization CVE-2026-84767 5.3 sungbyeongchan September 3, 2026
5 Bookit — Booking & Appointment Calendar <= 2.5.1 - Missing Authorization CVE-2026-40780 5.3 davidfdzmorilla April 22, 2026
6 Bookit <= 2.5.0 - Missing Authorization to Unauthenticated Settings Update CVE-2025-12841 5.3 Khaled Alenazi (Nxploited) November 15, 2025
7 Booking Calendar | Appointment Booking | Bookit <= 2.5.0 - Missing Authorization to Unauthenticated Stripe Connection CVE-2025-12633 7.5 Md. Moniruzzaman Prodhan (NomanProdhan) November 11, 2025
8 BookIt <=2.4.0 - Price Bypass CVE-2024-24715 4.9 Debangshu Kundu, Arpeet Rathi January 31, 2024
9 BookIt <= 2.4.3 - Authenticated(Administrator+) SQL Injection CVE-2023-50852 6.6 Muhammad Daffa December 21, 2023
10 BookIt <= 2.3.7 - Authentication Bypass CVE-2023-2834 9.8 István Márton June 20, 2023

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