Contact Form by Supsystic < 1.10.0 - Unauthenticated Payment Bypass

5.3
Client-Side Enforcement of Server-Side Security
CVE CVE-2026-73379
CVSS 5.3 (Medium)
Publicly Published August 18, 2026
Last Updated August 24, 2026
Researcher Asim Alshaya

Description

The Contact Form by Supsystic plugin for WordPress is vulnerable to Payment Bypass in all versions up to 1.10.0 (exclusive). This makes it possible for unauthenticated attackers to bypass payments.

References

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Vulnerability Details for Contact Form by Supsystic

Software Type Plugin
Software Slug contact-form-by-supsystic (view on wordpress.org)
Patched? Yes
Remediation Update to version 1.10.0, or a newer patched version
Affected Version
  • < 1.10.0
Patched Version
  • 1.10.0

Recent vulnerabilities in Contact Form by Supsystic

# Title CVE ID CVSS Researchers Date
1 Contact Form by Supsystic <= 1.10.2 - Unauthenticated Stored Cross-Site Scripting via IP Address Header CVE-2026-83625 7.2 andrea bocchetti September 4, 2026
2 Contact Form by Supsystic < 1.10.0 - Unauthenticated Stored Cross-Site Scripting CVE-2026-73378 7.2 Asim Alshaya August 18, 2026
3 Contact Form by Supsystic <= 1.7.36 - Unauthenticated Server-Side Template Injection via Prefill Functionality CVE-2026-4257 9.8 Azril Fathoni (kiseki) March 30, 2026
4 Contact Form by Supsystic <= 1.7.36 - Reflected Cross-Site Scripting CVE-2025-52753 6.1 63n0 August 18, 2025
5 Contact Form by Supsystic <= 1.7.29 - Cross-Site Request Forgery to Stored Cross-Site Scripting via saveAsCopy AJAX Action CVE-2024-13452 6.1 Tim Coen April 15, 2025
6 Contact Form by Supsystic <= 1.7.28 - Authenticated (Administrator+) Stored Cross-Site Scripting CVE-2024-48046 4.4 UKO October 14, 2024
7 Contact Form by Supsystic <= 1.7.28 - Authenticated (Admin+) Remote Code Execution CVE-2024-48042 7.2 Hakiduck October 13, 2024
8 Contact Form by Supsystic <= 1.7.27 - Cross-Site Request Forgery CVE-2023-45068 4.3 Taihei Shimamine October 3, 2023
9 Contact Form by Supsystic <= 1.7.24 - Cross-Site Request Forgery via AJAX action CVE-2023-2528 5.4 Marco Wotschka May 16, 2023
10 Contact Form by Supsystic < 1.7.20 - Authenticated (Admin+) Stored Cross-Site Scripting 5.5 Murat DEMIRCI October 28, 2021

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