Vulnerability · Published Jan 1, 2021 · Assigned by mitre
CVE-2020-35951
Critical 9.9
In plain English
A critical-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 76.3% (higher than 99.5% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei.
Official description
An issue was discovered in the Quiz and Survey Master plugin before 7.0.1 for WordPress. It allows users to delete arbitrary files such as wp-config.php file, which could effectively take a site offline and allow an attacker to reinstall with a WordPress instance under their control. This occurred via qsm_remove_file_fd_question, which allowed unauthenticated deletions (even though it was only intended for a person to delete their own quiz-answer files).