CVE-2026-65880 in Forms Extension
Summary
by MITRE • 07/28/2026
Joomla Extension - balbooa.com - Unauthenticated remote code execution in Balbooa Forms < 2.4.3 - An insecure form processing logic allowed code execution for forms that include the signature field type.
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Analysis
by VulDB Data Team • 07/28/2026
The vulnerability identified in Joomla extension Balbooa Forms affects versions prior to 2.4.3 and represents a critical security flaw enabling unauthenticated remote code execution through insecure form processing logic. This issue specifically impacts forms containing the signature field type, creating a pathway for attackers to execute arbitrary code on affected systems without requiring authentication credentials.
The technical implementation of this vulnerability stems from inadequate input validation and sanitization within the form processing pipeline. When signature fields are processed, the system fails to properly validate or sanitize user-supplied data, allowing malicious payloads to be injected and executed within the application context. This flaw aligns with common web application security weaknesses categorized under CWE-94, which describes "Improper Control of Generation of Code" where code is generated or executed based on user-controllable input without proper validation mechanisms.
The operational impact of this vulnerability extends beyond simple data compromise, as it provides attackers with full remote code execution capabilities. An attacker could leverage this vulnerability to install backdoors, exfiltrate sensitive data, modify system configurations, or establish persistent access to the affected Joomla installation. The unauthenticated nature of the exploit means that no prior authorization is required, making it particularly dangerous for public-facing web applications where such forms are accessible to all users.
This vulnerability maps to several ATT&CK techniques including T1059.007 for Command and Scripting Interpreter and T1566.001 for Phishing with Malicious Attachment, as attackers could potentially use the compromised system to further propagate their attacks. The security implications are compounded by the fact that signature fields are commonly used in legitimate business processes, making the exploitation less suspicious and more difficult to detect.
Organizations should prioritize immediate patching of affected installations to version 2.4.3 or later, which addresses the insecure form processing logic through enhanced input validation and sanitization measures. Additional mitigations include implementing web application firewalls to monitor for suspicious form submissions, restricting access to forms containing signature fields where possible, and conducting comprehensive security audits of all third-party extensions. The vulnerability demonstrates the critical importance of validating all user inputs and implementing proper code generation controls as outlined in security best practices and industry standards.