Description
WordPress Plugin Contact Form 7 is prone to a vulnerability that lets attackers upload arbitrary files because the application fails to properly verify user-supplied input. An attacker can exploit this vulnerability to upload arbitrary code and run it in the context of the webserver process. This may facilitate unauthorized access or privilege escalation; other attacks are also possible. WordPress Plugin Contact Form 7 version 5.3.1 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 5.3.2 or latest
References
https://www.jinsonvarghese.com/unrestricted-file-upload-in-contact-form-7/
https://www.exploit-db.com/exploits/49294
https://packetstormsecurity.com/files/160630/WordPress-Contact-Form-7-5.3.1-Shell-Upload.html
https://contactform7.com/2020/12/17/contact-form-7-532/
https://plugins.svn.wordpress.org/contact-form-7/trunk/readme.txt
Related Vulnerabilities
WordPress Plugin SEO SearchTerms Tagging 2 Multiple Vulnerabilities (1.535)
WordPress Plugin Video.js-HTML5 Video Player for Wordpress Cross-Site Scripting (4.5.0)
WordPress Plugin WP Statistics Cross-Site Scripting (12.0.9)
WordPress Plugin cformsII 'lib_ajax.php' Multiple Cross-Site Scripting Vulnerabilities (13.1)
WordPress Plugin Drag and Drop Multiple File Upload-Contact Form 7 Security Bypass (1.3.6.4)