Overview
In this post, we are taking a deep dive into a recently discovered vulnerability, CVE-2025-55733, that plagues DeepChat, an AI-powered personal assistant. DeepChat is widely employed by businesses and individuals alike due to its powerful AI capabilities, making the implications of this vulnerability far-reaching and severe. The CVE-2025-55733 vulnerability enables remote code execution through a single click, potentially leading to full system compromise or data leakage, which is a grave concern for all users.
Vulnerability Summary
CVE ID: CVE-2025-55733
Severity: Critical (9.6 CVSS Score)
Attack Vector: User Interaction with a specially crafted deepchat: URL
Privileges Required: None
User Interaction: Required
Impact: Remote Code Execution leading to potential system compromise or data leakage
Affected Products
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Product | Affected Versions
DeepChat | Before 0.3.1
How the Exploit Works
The exploit takes advantage of a one-click remote code execution vulnerability in DeepChat versions before 0.3.1. An attacker needs to embed a specially crafted deepchat: URL on any website, which could include a malicious one they control. When a victim visits this infected site or clicks on the malicious link, the browser triggers DeepChat’s custom URL handler (deepchat:), causing the DeepChat application to launch and process the URL. This action further leads to remote code execution on the victim’s machine, potentially compromising their system or leading to data leakage.
Conceptual Example Code
The attacker creates a webpage or sends an email containing a link like this:
<a href="deepchat://malicious_code_here">Click Here</a>When a user with the DeepChat application installed clicks this link, their browser will trigger the DeepChat custom URL handler, which then processes the URL and executes the malicious code embedded within it.
Impact
Successful exploitation of this vulnerability allows an attacker to execute arbitrary code on the victim’s system, potentially leading to system compromise or data leakage. Depending on the permissions the DeepChat application has, an attacker may gain access to sensitive information, modify system settings, or even gain complete control over the system.
Recommendation
Users of DeepChat are strongly advised to update their application to version 0.3.1 or later, which contains a fix for this vulnerability. If an update is not immediately possible, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. However, these are not long-term solutions and updating the application should be prioritized to ensure complete protection from this vulnerability.