The Quiz And Survey Master for WordPress is vulnerable to authorization bypass due to a missing capability check on the function associated with the qsm_remove_file_fd_question AJAX action in versions up to, and including, 8.0.8. This makes it possible for unauthenticated attackers to delete arbitrary media files.

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-0291
• https://packetstormsecurity.com/files/171011/wpqsm808-xsrf.txt
• https://plugins.trac.wordpress.org/changeset/2834471/quiz-master-next
• https://www.wordfence.com/threat-intel/vulnerabilities/id/68110321-db1a-4634-98cd-0afd3ec933b8?source=cve
• https://wordpress.org/plugins/quiz-master-next