Simple Signup Form WordPress Plugin SQL Injection Vulnerability

A SQL injection vulnerability has been identified in the Simple Signup Form plugin for WordPress, affecting all versions through 1.6.5. The vulnerability arises from inadequate escaping of user-supplied parameters in the 'id' attribute of the 'ssf' shortcode, coupled with a lack of proper preparation for the existing SQL query. This flaw allows authenticated attackers with Contributor-level access and above to inject additional SQL queries into existing ones, potentially leading to the extraction of sensitive information from the database.

Impact

Exploitation of this vulnerability allows for SQL injection, where an attacker can manipulate SQL queries to access or modify database information. In this case, it could be used to extract sensitive data from the database.

Reproduction

To reproduce this vulnerability, an authenticated user with Contributor-level access or higher can use the 'ssf' shortcode, specifying an 'id' attribute. The plugin's insufficient input handling will allow the injection of malicious SQL that could be executed on the database.

Remediation

No known patch is available for this vulnerability. Users are advised to review the vulnerability details and consider uninstalling the affected plugin.