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qBittorrent is a free software cross-platform BitTorrent client GUI written with Qt4. The program uses libtorrent-rasterbar library for the torrent back-end (network communication) functionality. It is developed by Christophe Dumez, from the University of Technology of Belfort-Montbeliard in France. It was started in March 2006 and has been in active development ever since. qBittorrent aims to have a small foot-print, to be powerful, intuitive and visually attractive going beyond the current functions widely provided by other applications. qBittorrent is an attempt to provide a µTorrent equivalent that is open-source and multi-platform adding a streaming-like function to let users download-and-play video files. qBittorrent is currently offering functionality comparable to more popular BitTorrent clients such as Vuze but without requiring the Java Virtual Machine. qBittorrent requires Python only for the search engine while other clients such as Deluge and BitTornado require it for the BitTorrent protocol itself. ## Features - Polished µTorrent-like User Interface - Well-integrated and extensible Search Engine - Simultaneous search in most famous BitTorrent search sites - Per-category-specific search requests (e.g. Books, Music, Movies) - All Bittorrent extensions - DHT, Peer Exchange, Full encryption, Magnet/BitComet URIs, ... - Remote control through a Web user interface - Nearly identical to the regular UI, all in Ajax - Advanced control over trackers, peers and torrents - Torrents queueing and prioritizing - Torrent content selection and prioritizing - UPnP / NAT-PMP port forwarding support - Available in ~41 languages (Unicode support) - Torrent creation tool - Advanced RSS support with download filters (inc. regex) - Bandwidth scheduler - IP Filtering (eMule and PeerGuardian compatible) - IPv6 compliant - Sequential downloading (aka "Download in order") - Available on most platforms: Linux, Mac OS X, Windows, OS/2, FreeBSD ## Notes - This version includes the 64-bit version of qbittorrent, if you wish to continue using the 32-bit version you need to pass `--x86` when calling `choco install/update` - Beginning with v4.5.0, only 64-bit version is offered. If you have the 32-bit version installed, pin the version to 4.4.5 with command `choco pin add --name="'qbittorrent'" --version="'4.4.5'"` ![qbittorrent screenshot](https://cdn.rawgit.com/chocolatey/chocolatey-coreteampackages/798547edb9c6cb22a4a58e08361da4450f0ab14c/automatic/qbittorrent/screenshot.png)

CVE History

CVEAffectedPublishedCVSS v3CVSS v2
< 5.1.24 MEDIUM

qBittorrent before 5.1.2 does not prevent access to a local file that is referenced in a link URL. This affects rsswidget.cpp and searchjobwidget.cpp.

< 5.0.18.1 HIGH

qBittorrent before 5.0.1 proceeds with use of https URLs even after certificate validation errors.

<= 4.5.59.8 CRITICAL

All versions of the qBittorrent client through 4.5.5 use default credentials when the web user interface is enabled. The administrator is not forced to change the default credentials. As of 4.5.5, this issue has not been fixed. A remote attacker can use the default credentials to authenticate and execute arbitrary operating system commands using the "external program" feature in the web user interface. This was reportedly exploited in the wild in March 2023.

< 4.1.77.5 HIGH

In qBittorrent before 4.1.7, the function Application::runExternalProgram() located in app/application.cpp allows command injection via shell metacharacters in the torrent name parameter or current tracker parameter, as demonstrated by remote command execution via a crafted name within an RSS feed.

= 3.3.153.6 LOW

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

<= 3.3.104.3 MEDIUM

WebUI in qBittorrent before 3.3.11 did not escape many values, which could potentially lead to XSS.

<= 3.3.104.3 MEDIUM

WebUI in qBittorrent before 3.3.11 did not set the X-Frame-Options header, which could potentially lead to clickjacking.