OctoPrint XSS via the "Snapshot Test" feature in Classic Webcam plugin settings

OctoPrint provides a web interface for controlling consumer 3D printers. OctoPrint versions up until and including 1.9.3 contain a vulnerability that allows malicious admins to configure or talk a victim with administrator rights into configuring a webcam snapshot URL which when tested through the "Test" button included in the web interface will execute JavaScript code in the victims browser when attempting to render the snapshot image. An attacker who successfully talked a victim with admin rights into performing a snapshot test with such a crafted URL could use this to retrieve or modify sensitive configuration settings, interrupt prints or otherwise interact with the OctoPrint instance in a malicious way. The vulnerability is patched in version 1.10.0rc3. OctoPrint administrators are strongly advised to thoroughly vet who has admin access to their installation and what settings they modify based on instructions by strangers.

API key access in settings without reauthentication in OctoPrint

OctoPrint provides a web interface for controlling consumer 3D printers. OctoPrint versions up until and including 1.10.2 contain a vulnerability that allows an attacker that has gained temporary control over an authenticated victim's OctoPrint browser session to retrieve/recreate/delete the user's or - if the victim has admin permissions - the global API key without having to reauthenticate by re-entering the user account's password. An attacker could use a stolen API key to access OctoPrint through its API, or disrupt workflows depending on the API key they deleted. This vulnerability will be patched in version 1.10.3 and all users are advised to upgrade. There are no known workarounds for this vulnerability.

Jinja2 Templates are vulnerable to XSS attacks due to their configuration in OctoPrint

OctoPrint provides a web interface for controlling consumer 3D printers. OctoPrint versions up until and including 1.10.2 contain reflected XSS vulnerabilities in the login dialog and the standalone application key confirmation dialog. An attacker who successfully talked a victim into clicking on a specially crafted login link, or a malicious app running on a victim's computer triggering the application key workflow with specially crafted parameters and then redirecting the victim to the related standalone confirmation dialog could use this to retrieve or modify sensitive configuration settings, interrupt prints or otherwise interact with the OctoPrint instance in a malicious way. The above mentioned specific vulnerabilities of the login dialog and the standalone application key confirmation dialog have been patched in the bugfix release 1.10.3 by individual escaping of the detected locations. A global change throughout all of OctoPrint's templating system with the upcoming 1.11.0 release will handle this further, switching to globally enforced automatic escaping and thus reducing the attack surface in general. The latter will also improve the security of third party plugins. During a transition period, third party plugins will be able to opt into the automatic escaping. With OctoPrint 1.13.0, automatic escaping will be switched over to be enforced even for third party plugins, unless they explicitly opt-out.

Improper Neutralization of Special Elements Used in a Template Engine in OctoPrint

OctoPrint is a web interface for 3D printers. OctoPrint versions up until and including 1.9.2 contain a vulnerability that allows malicious admins to configure a specially crafted GCODE script that will allow code execution during rendering of that script. An attacker might use this to extract data managed by OctoPrint, or manipulate data managed by OctoPrint, as well as execute arbitrary commands with the rights of the OctoPrint process on the server system. OctoPrint versions from 1.9.3 onward have been patched. Administrators of OctoPrint instances are advised to make sure they can trust all other administrators on their instance and to also not blindly configure arbitrary GCODE scripts found online or provided to them by third parties.

Unverified Password Change in octoprint/octoprint

Unverified Password Change in GitHub repository octoprint/octoprint prior to 1.8.3.

Authentication Bypass by Primary Weakness in octoprint/octoprint

An attacker can freely brute force username and password and can takeover any account. An attacker could easily guess user passwords and gain access to user and administrative accounts.

Cross-site Scripting (XSS) - Generic in octoprint/octoprint

Cross-site Scripting (XSS) - Generic in GitHub repository octoprint/octoprint prior to 1.8.0.

Cross-site Scripting (XSS) - DOM in octoprint/octoprint

Cross-site Scripting (XSS) - DOM in GitHub repository octoprint/octoprint prior to 1.8.0.

OctoPrint before 1.6.0 allows XSS because API error messages include the values of input parameters.

The Logging subsystem in OctoPrint before 1.6.0 has incorrect access control because it attempts to manage files that are not *.log files.

OctoPrint through 1.3.9 allows remote attackers to obtain sensitive information or cause a denial of service via HTTP requests on port 8081. NOTE: the vendor disputes the significance of this report because their documentation states that with "blind port forwarding ... Putting OctoPrint onto the public internet is a terrible idea, and I really can't emphasize that enough.