Caldera Forms Cross-Site Scripting (XSS) Scanner

Caldera Forms is a popular WordPress plugin used for creating custom forms on websites. It is widely utilized by website administrators to easily build interactive and versatile forms without requiring advanced technical skills. The plugin is favored for its drag-and-drop interface, which simplifies the process of form creation. Businesses and organizations use Caldera Forms to collect user data, conduct surveys, and facilitate online interactions. Its compatibility with various add-ons and plugins enhances its functionality, making it a preferred choice for millions of WordPress users globally.

The Cross-Site Scripting (XSS) vulnerability identified in Caldera Forms arises due to improper handling of user input. This vulnerability allows attackers to inject malicious JavaScript code into form submissions. When users or administrators view the infected form entries, the malicious script executes, potentially compromising user data. This vulnerability poses a significant risk as it bridges user interaction with malicious scripts, largely due to inadequate input validation and output escaping mechanisms within the plugin. Prompt updates and security patches are essential to mitigate these risks.

Vulnerability details indicate that the affected feature is the form submission functionality of Caldera Forms. The vulnerability stems from insufficient input sanitization and output escaping, particularly within the form entries and confirmation processes. Malicious actors exploit this loophole by crafting JavaScript payloads that execute after injection. The vulnerable endpoint originates during POST and GET requests to specific admin panel URLs of the WordPress site. Testing procedures exploit this endpoint using crafted scripts to verify vulnerability presence within specific plugin versions.

Exploitation of this XSS vulnerability can lead to various detrimental outcomes, such as session hijacking and the theft of sensitive information like user credentials and personal data. As users interact with compromised forms, attackers can gain unauthorized access to accounts, execute actions with victim credentials, or distribute further malicious payloads. The unchecked execution of malicious scripts risks the integrity and confidentiality of user data, rendering affected sites susceptible to escalating attacks that target website functionality and user trust.

REFERENCES

• https://wpscan.com/vulnerability/c70219da-eab2-4d0b-ac5a-77f6d565ef31
• https://wordpress.org/plugins/caldera-forms