Online Forms — Customizable Payment, Contact, Quiz, Survey Form Builder – Jotform Security & Risk Analysis

The "embed-form" plugin v1.3.9 presents a mixed security posture. On the positive side, the plugin demonstrates good practices by using prepared statements for all SQL queries, properly escaping all output, and having no file operations or external HTTP requests. The static analysis did not reveal any critical or high severity taint flows, suggesting that direct injection vulnerabilities are not immediately apparent in the analyzed code paths.

However, there are notable concerns. The plugin has a relatively small attack surface with only two entry points, but one of these entry points, an AJAX handler, lacks authentication checks. This unprotected AJAX handler is a significant risk, as it could be exploited by unauthenticated users. Furthermore, the plugin has a history of known vulnerabilities, including a medium-severity Cross-Site Scripting (XSS) flaw discovered in April 2024. While this specific vulnerability is currently unpatched, its presence indicates potential weaknesses in input sanitization or output encoding, even if not evident in the current static analysis. The absence of nonce checks on the unprotected AJAX handler further exacerbates this risk.

In conclusion, while the plugin exhibits some strong security foundations, the unprotected AJAX handler and its history of XSS vulnerabilities are serious concerns that outweigh the positive aspects. The lack of authentication on an entry point creates a direct path for potential attacks, and the past vulnerability suggests a pattern that needs careful monitoring and remediation.