CVE-2025-43014 Overview
CVE-2025-43014 affects the JetBrains Toolbox App before version 2.6. The SSH plugin established connections without sufficient user confirmation, allowing an attacker to trigger Secure Shell (SSH) sessions through crafted requests. The weakness is categorized under [CWE-304] (Missing Critical Step in Authentication). JetBrains addressed the issue in Toolbox App 2.6 and documented the fix in its security advisory.
Critical Impact
Attackers can initiate SSH connections through the Toolbox App without adequate user confirmation, exposing limited confidentiality and integrity of connected systems.
Affected Products
- JetBrains Toolbox App versions prior to 2.6
- JetBrains Toolbox SSH plugin component
- Developer workstations running vulnerable Toolbox installations
Discovery Timeline
- 2025-04-17 - CVE-2025-43014 published to the National Vulnerability Database (NVD)
- 2026-06-17 - Last updated in the NVD database
Technical Details for CVE-2025-43014
Vulnerability Analysis
The JetBrains Toolbox App integrates an SSH plugin that automates remote development connections. In versions before 2.6, the plugin initiated outbound SSH connections without requiring adequate confirmation from the user. An attacker able to trigger the plugin through a crafted link or protocol handler could establish sessions the user did not explicitly authorize.
The issue maps to [CWE-304], a missing critical step in authentication. The confirmation prompt that should validate user intent before opening an SSH channel was absent or insufficient. This allowed automated invocation flows to bypass the user consent gate.
The network attack path requires no authentication and no user interaction beyond visiting or receiving crafted content that invokes the plugin. Exploitation impacts confidentiality and integrity at a limited scope, since the resulting SSH session inherits the privileges of the local user's key material and known hosts.
Root Cause
The SSH plugin trusted invocation requests without enforcing an interactive confirmation step. Missing user validation before establishing outbound sessions is the underlying defect.
Attack Vector
An attacker delivers a crafted URI or request that the Toolbox App processes. The SSH plugin opens a connection to an attacker-controlled or attacker-specified host, exposing local SSH credentials or enabling redirection of developer traffic.
No verified public proof-of-concept is available for CVE-2025-43014.
See the JetBrains advisory for technical details:
https://www.jetbrains.com/privacy-security/issues-fixed/
Detection Methods for CVE-2025-43014
Indicators of Compromise
- Unexpected outbound SSH sessions originating from the JetBrains Toolbox App process on developer endpoints
- Toolbox App logs showing SSH plugin invocations without a corresponding user confirmation event
- Connections to SSH endpoints not present in the developer's known project list or history
Detection Strategies
- Monitor process telemetry for jetbrains-toolbox spawning SSH client activity to unusual destinations
- Correlate SSH connection attempts with Toolbox App URI handler invocations
- Baseline authorized remote development hosts and alert on deviations
Monitoring Recommendations
- Inventory Toolbox App versions across developer endpoints and flag any release below 2.6
- Capture endpoint DNS and network telemetry for outbound port 22 traffic tied to Toolbox App child processes
- Track custom URI scheme handlers registered by JetBrains products for anomalous invocations
How to Mitigate CVE-2025-43014
Immediate Actions Required
- Upgrade the JetBrains Toolbox App to version 2.6 or later on all developer workstations
- Audit recent SSH plugin activity in Toolbox App logs for unauthorized connection attempts
- Rotate SSH keys stored on endpoints if suspicious plugin activity is identified
Patch Information
JetBrains fixed the issue in Toolbox App 2.6. Details are published in the JetBrains Security Issues Fixed advisory. Deploy the update through the Toolbox App's built-in updater or through managed software distribution.
Workarounds
- Disable the SSH plugin in the Toolbox App until the upgrade to version 2.6 completes
- Restrict handling of custom URI schemes registered by the Toolbox App at the operating system level
- Enforce SSH key passphrases so any unauthorized session prompts for credentials
# Verify installed JetBrains Toolbox App version (Linux/macOS)
jetbrains-toolbox --version
# Upgrade path: relaunch Toolbox App and apply pending updates,
# or reinstall from the vendor download page to obtain 2.6 or later.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
