Vulnerability in Quiz and Survey Master Plugin for WordPress
CVE-2026-14820
Currently unrated
What is CVE-2026-14820?
The Quiz and Survey Master plugin for WordPress, prior to version 11.1.3, suffers from a vulnerability that allows unauthenticated attackers to perform username enumeration and brute-force attacks. The plugin lacks appropriate rate limiting and fails to log unsuccessful login attempts effectively. This enables malicious users to differentiate between valid and invalid usernames based on the responses provided, ultimately circumventing any existing brute-force protection mechanisms.
Affected Version(s)
Quiz and Survey Master (QSM) 0 < 11.1.3
Exploit Proof of Concept (PoC)
PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.