WordPress Plugin Vulnerabilities
FluentForms < 4.3.25 - Contributor+ Stored XSS via Custom HTML Form Field
Description
The plugin does not properly sanitize and escape the srcdoc attribute in iframes in it's custom HTML field type, allowing a logged in user with roles as low as contributor to inject arbitrary javascript into a form which will trigger for any visitor to the form or admins previewing or editing the form.
Proof of Concept
As a contributor, create a blank form and add custom html field with the following content in the "Text" tab of the field editor: <p>Some description about this section</p><p><iframe srcdoc="<script>alert(document.cookie)</script>"></iframe></p> Do not decode the payload. And please ensure that payload is added when editor has Text tab selected. Save the form, it will trigger xss payload.
Affects Plugins
Fixed in 4.3.25 References
CVE
Classification
Type
XSS
OWASP top 10
CWE
CVSS
Miscellaneous
Original Researcher
Vaibhav Rajput
Submitter
Vaibhav Rajput
Verified
Yes
WPVDB ID
Timeline
Publicly Published
2023-03-20 (about 1 years ago)
Added
2023-03-20 (about 1 years ago)
Last Updated
2023-03-20 (about 1 years ago)
WPScan 