CVE-2025-58768
📋 TL;DR
This vulnerability in DeepChat's Mermaid chart rendering component allows cross-site scripting (XSS) that can lead to remote command execution. Attackers can inject malicious JavaScript that executes arbitrary commands via exposed IPC. Users of DeepChat versions before 0.3.5 are affected.
💻 Affected Systems
- DeepChat
📦 What is this software?
Deepchat by Thinkinai
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with arbitrary command execution leading to data theft, system takeover, or lateral movement within the network.
Likely Case
XSS leading to session hijacking, data exfiltration, or limited command execution within the application context.
If Mitigated
XSS contained within browser sandbox without command execution capability.
🎯 Exploit Status
Exploit chain documented in GHSA-hqr4-4gfc-5p2j advisory. XSS leads to command execution via exposed IPC.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.3.5
Vendor Advisory: https://github.com/ThinkInAIXYZ/deepchat/security/advisories/GHSA-f7q5-vc93-wp6j
Restart Required: Yes
Instructions:
1. Update DeepChat to version 0.3.5 or later. 2. Restart the DeepChat service. 3. Verify the update was successful.
🔧 Temporary Workarounds
Disable Mermaid rendering
allTemporarily disable Mermaid chart functionality to prevent exploitation
Modify DeepChat configuration to disable Mermaid integration
Content Security Policy
allImplement strict CSP headers to mitigate XSS impact
Add 'Content-Security-Policy' header with script-src restrictions
🧯 If You Can't Patch
- Isolate DeepChat instance from critical systems and networks
- Implement network segmentation and strict firewall rules
🔍 How to Verify
Check if Vulnerable:
Check DeepChat version. If version is less than 0.3.5, system is vulnerable.Check Version:
Check DeepChat configuration or package manager for version informationVerify Fix Applied:
Confirm DeepChat version is 0.3.5 or higher and test Mermaid rendering with safe content.📡 Detection & Monitoring
Log Indicators:
- Unusual JavaScript execution patterns
- Suspicious Mermaid content processing
- IPC command execution from web context
Network Indicators:
- Unexpected outbound connections from DeepChat process
- Command and control traffic patterns
SIEM Query:
source="deepchat" AND (event="mermaid_render" OR event="javascript_execution") AND status="suspicious"