ThinkInAIXYZ deepchat up to 0.5.1 Renderer Interface cross site scripting

Summaryinfo

A vulnerability marked as problematic has been reported in ThinkInAIXYZ deepchat up to 0.5.1. Affected by this vulnerability is an unknown functionality of the component Renderer Interface. The manipulation leads to cross site scripting. This vulnerability is documented as CVE-2025-66481. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in ThinkInAIXYZ deepchat up to 0.5.1. It has been rated as problematic. This issue affects an unknown code of the component Renderer Interface. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-80. The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages. Impacted is integrity. The summary by CVE is:

DeepChat is an open-source AI chat platform that supports cloud models and LLMs. Versions 0.5.1 and below are vulnerable to XSS attacks through improperly sanitized Mermaid content. The recent security patch for MermaidArtifact.vue is insufficient and can be bypassed using unquoted HTML attributes combined with HTML entity encoding. Remote Code Execution is possible on the victim's machine via the electron.ipcRenderer interface, bypassing the regex filter intended to strip dangerous attributes. There is no fix at time of publication.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2025-66481 since 12/02/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Chat Software

Vendor

• ThinkInAIXYZ

Name

• deepchat

Version

• 0.5.0
• 0.5.1

Website

• Product: https://github.com/ThinkInAIXYZ/deepchat/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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