Description:

Formidable Form Builder for WordPress versions before 2.05.03 contains a stored cross-site scripting caused by insufficient input sanitization and output escaping in form parameters like 'after_html', letting unauthenticated attackers inject and execute arbitrary scripts in victims' browsers.

Severity: High

POC:

• https://klikki.fi/adv/formidable.html

KEV: True

Shodan Query: NA

Acceptance Criteria: The template must include a complete POC and should not rely solely on version-based detection. Contributors are required to provide debug data(-debug) along with the template to help the triage team with validation or can also share a vulnerable environment like docker file.

Rewards will only be given once the template is fully validated by the team. Templates that are incomplete or invalid will not be accepted. Avoid adding code templates for CVEs that can be achieved using HTTP, TCP, or JavaScript. Such templates are blocked by default and won’t produce results, so we prioritize creating templates with other protocols unless exceptions are made.

You can check the FAQ for the Nuclei Templates Community Rewards Program here.