CVE-2026-65442 in FormCraft Plugin
Summary
by MITRE • 07/28/2026
Unauthenticated Server Side Request Forgery (SSRF) in FormCraft <= 3.9.15 versions.
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Analysis
by VulDB Data Team • 07/28/2026
Server Side Request Forgery vulnerabilities represent one of the most critical security flaws in web applications, allowing attackers to manipulate server-side requests to access internal resources that should otherwise remain protected. This specific vulnerability affects FormCraft versions up to and including 3.9.15, where an unauthenticated attacker can exploit a lack of proper input validation to force the application's server to make HTTP requests to arbitrary destinations. The flaw occurs when user-supplied data is directly used in server-side HTTP requests without adequate sanitization or destination validation, creating a pathway for malicious actors to bypass network segmentation and access internal systems.
The technical implementation of this vulnerability stems from insufficient validation of URLs within FormCraft's form processing functionality. When forms are submitted, the application processes user inputs through server-side components that fail to properly validate or sanitize URL parameters, enabling attackers to inject malicious URLs that will be executed by the server. This flaw allows an attacker to potentially access internal services, databases, or other resources that are normally protected from external network access. The vulnerability is particularly dangerous because it requires no authentication to exploit, making it accessible to anyone who can submit data to the vulnerable application, and it can be leveraged to perform reconnaissance activities or escalate privileges within the internal network infrastructure.
The operational impact of this SSRF vulnerability extends beyond simple data exfiltration, as it provides attackers with the capability to perform extensive reconnaissance on internal network resources. Attackers can use this vulnerability to enumerate internal services, access sensitive information stored in internal databases, or even establish further attack vectors by targeting other vulnerable systems within the same network segment. The vulnerability aligns with CWE-918, which specifically addresses Server-Side Request Forgery flaws where untrusted user data is used to construct HTTP requests without proper validation. This weakness can be categorized under ATT&CK technique T1071.004 for application layer protocol usage and T1566 for malicious email attachments or web content, as the exploitation often begins through web-based attack surfaces.
Mitigation strategies for this vulnerability must address both immediate patching requirements and long-term architectural improvements. Organizations should immediately upgrade to FormCraft version 3.9.16 or later, which contains patches specifically designed to validate and sanitize URL inputs within form processing components. Additionally, implementing network-level restrictions such as firewall rules that prevent internal server-to-server communication can significantly reduce the attack surface. Input validation should be strengthened through proper URL parsing and validation routines that reject malformed or suspicious URLs, while also implementing outbound request restrictions that limit which external destinations the application can communicate with. Security monitoring should include detection of unusual outbound requests from the application server, particularly those targeting internal IP ranges or non-standard ports, as these patterns often indicate successful exploitation attempts.