CVE-2017-12778: Qbittorrent

High severity, CVSS 7.1. EPSS: 0.5% chance of exploitation in the next 30 days.

The UI Lock feature in qBittorrent version 3.3.15 is vulnerable to Authentication Bypass, which allows Attack to gain unauthorized access to qBittorrent functions by tampering the affected flag value of the config file at the C:\Users\<username>\Roaming\qBittorrent pathname. The attacker must change the value of the "locked" attribute to "false" within the "Locking" stanza. NOTE: This is an intended behavior. See https://github.com/qbittorrent/qBittorrent/wiki/I-forgot-my-UI-lock-password

Affected products

• Qbittorrent Qbittorrent: version 3.3.15 only

Published 2019-05-09. Last modified 2026-06-17.