TI-2025-35154 Aliases CVE-2025-55733

DeepChat One-click Remote Code Execution through Custom URL Handling

HIGH 76CWE-94Published 2025-08-19 · Updated 2025-08-19

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-94.

Summary

DeepChat is a smart assistant that connects powerful AI to your personal world. DeepChat before 0.3.1 has a one-click remote code execution vulnerability. An attacker can exploit this vulnerability by embedding a specially crafted deepchat: URL on any website, including a malicious one they control. When a victim visits such a site or clicks on the link, the browser triggers the app’s custom URL handler (deepchat:), causing the DeepChat application to launch and process the URL, leading to remote code execution on the victim’s machine. This vulnerability is fixed in 0.3.1.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.0068 52nd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed deepchat (ThinkInAIXYZ): 0.3.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
ThinkInAIXYZ	deepchat	before 0.3.1	0.3.1	Patch available	CNA

deepchat VendorThinkInAIXYZ Affected before 0.3.1 Fixed in 0.3.1 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:thinkinai:deepchat:0.3.0:::::::*	0.3.0	Vulnerable	ThinkInAIXYZ

cpe:2.3:a:thinkinai:deepchat:0.3.0:*:*:*:*:*:*:* Versions 0.3.0 Vulnerable ·ThinkInAIXYZ

Remediation

Fix · CNA deepchat (ThinkInAIXYZ) Fixed in 0.3.1

Timeline

2026-10-02 Threatist record created from CVE-2025-55733

References

Exploit 1

https://github.com/ThinkInAIXYZ/deepchat/security/advisories/GHSA-hqr4-4gfc-5p2j

Patch 1

https://github.com/ThinkInAIXYZ/deepchat/commit/a0ff6f362e01ddceb7fd42d0af0b28b6184fb4d2

TI-2025-41440 Mermaid XSS vulnerability leads to Remote Code Execution CVSS 3.1CRITICAL 9.7
TI-2025-40905 DeepChat's Incomplete XSS Fix Allows RCE through Mermaid Content CVSS 3.1CRITICAL 9.7
TI-2025-40724 DeepChat Cross-Site Scripting(XSS) escalate to Remote Code Execution(RCE) CVSS 3.1CRITICAL 9.7
TI-2025-36426 DeepChat's Mermaid rendering has XSS leading to RCE CVSS 3.1CRITICAL 9.7

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences