Ultra Addons for Contact Form 7 <= 3.5.51 - Authenticated (Editor+) PHP Object Injection

6.6
Deserialization of Untrusted Data
CVE CVE-2026-96833
CVSS 6.6 (Medium)
Publicly Published September 24, 2026
Last Updated September 30, 2026
Researcher Ananda Dhakal

Description

The Ultra Addons for Contact Form 7 plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.5.51. This is due to deserialization of untrusted input. This makes it possible for authenticated attackers, with editor-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.

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Vulnerability Details for Ultra Addons for Contact Form 7

Software Type Plugin
Software Slug ultimate-addons-for-contact-form-7 (view on wordpress.org)
Patched? Yes
Remediation Update to version 3.5.52, or a newer patched version
Affected Version
  • <= 3.5.51
Patched Version
  • 3.5.52

Recent vulnerabilities in Ultra Addons for Contact Form 7

# Title CVE ID CVSS Researchers Date
1 Ultra Addons for Contact Form 7 <= 3.5.50 - Unauthenticated Arbitrary File Upload via Signature Form Field CVE-2026-82901 9.8 Supakiad S. (m3ez) September 26, 2026
2 Ultra Addons for Contact Form 7 <= 3.5.50 - Authenticated (Contributor+) Stored Cross-Site Scripting CVE-2026-95586 6.4 Marc-André Beaulieu September 22, 2026
3 Ultimate Addons for Contact Form 7 3.2.4 - 3.5.50 - Unauthenticated Arbitrary File Upload CVE-2026-84750 9.8 Jakub Herman September 17, 2026
4 Ultra Addons for Contact Form 7 <= 3.5.43 - Authenticated (Contributor+) Stored Cross-Site Scripting via Slider Attributes CVE-2026-12801 6.4 Webbernaut August 6, 2026
5 Ultimate Addons for Contact Form 7 <= 3.5.45 - Unauthenticated Stored Cross-Site Scripting CVE-2026-65439 7.2 Nguyen Ba Khanh July 27, 2026
6 Ultra Addons for Contact Form 7 <= 3.5.36 - Authenticated (Contributor+) Stored Cross-Site Scripting CVE-2026-32460 6.4 Marc-André Beaulieu (h3dg3h0g) March 14, 2026
7 Ultimate Addons for Contact Form 7 <= 3.5.34 - Missing Authorization CVE-2026-24945 5.3 Legion Hunter December 13, 2025
8 Ultra Addons for Contact Form 7 <= 3.5.33 - Missing Authorization to Authenticated (Subscriber+) to Generate Form Submission PDF CVE-2025-14356 4.3 shark3y December 11, 2025
9 Ultra Addons for Contact Form 7 <= 3.5.21 - Authenticated (Contributor+) Stored Cross-Site Scripting via UACF7_CUSTOM_FIELDS Shortcode CVE-2025-6756 6.4 Muhammad Yudha - DJ June 30, 2025
10 Ultra Addons for Contact Form 7 3.5.11 - 3.5.19 - Unauthenticated Stored Cross-Site Scripting via Database module CVE-2025-6212 7.2 Sy5temFr4cture June 25, 2025

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