Horizon Alert
Summary of the vulnerability and why it matters
This advisory highlights a critical vulnerability in DeepChat, an AI-powered smart assistant application. The issue involves the way the application renders certain diagrams, which could allow an attacker to execute malicious code on a user's system, potentially leading to broader system compromise. The main concern is confirming if this application is in use and, if so, understanding the extent of its deployment.
- Stored XSS in diagram rendering allows code execution.
- Escalated to RCE by exploiting Electron IPC.
- Confirm relevance and exposure within the organization.
Attack Path
How an attacker could exploit the issue
An attacker could target users of DeepChat by tricking them into interacting with a specially crafted message containing malicious code. This code exploits a flaw in how the application renders diagrams, allowing JavaScript to run within the app. If successful, this could then be used to execute arbitrary code on the user's computer.
- Requires no prior access to the system.
- Triggered by viewing a malicious diagram.
- Allows arbitrary code execution.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability could allow an attacker to execute arbitrary JavaScript within the application's context when a specially crafted Mermaid diagram is rendered. When supported, this could be escalated to remote code execution through the Electron IPC bridge by registering and starting a malicious MCP server.
- Arbitrary JavaScript execution in application context.
- Malicious diagram rendering via user interaction.
- Potential for remote code execution.
Operational Fix
Recommended remediation, mitigation, and detection steps
For DeepChat, application owners and platform teams are likely responsible for addressing this stored XSS and RCE vulnerability. The first practical step is to identify all instances of DeepChat, confirm their business criticality and exposure, and then assign an accountable owner before planning remediation activities.
- App owners should manage remediation.
- Verify Electron IPC bridge usage.
- Plan maintenance for upgrades.
