CVE-2025-51859
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-07-22

Last updated on: 2025-07-25

Assigner: MITRE

Description
Stored Cross-Site Scripting (XSS) vulnerability in Chaindesk thru 2025-05-26 in its agent chat component. An attacker can achieve arbitrary client-side script execution by crafting an AI agent whose system prompt instructs the underlying Large Language Model (LLM) to embed malicious script payloads (e.g., SVG-based XSS) into its chat responses. When a user interacts with such a malicious agent or accesses a direct link to a conversation containing an XSS payload, the script executes in the user's browser. Successful exploitation can lead to the theft of sensitive information, such as JWT session tokens, potentially resulting in account hijacking.
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Meta Information
Published
2025-07-22
Last Modified
2025-07-25
Generated
2026-05-06
AI Q&A
2025-07-22
EPSS Evaluated
2026-05-05
NVD
EUVD
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
chaindesk chaindesk *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability is a Stored Cross-Site Scripting (XSS) issue in Chaindesk's agent chat component. An attacker can create a malicious AI agent that instructs the underlying Large Language Model (LLM) to include harmful script payloads in its chat responses. When a user interacts with this malicious agent or accesses a conversation containing the XSS payload, the malicious script runs in the user's browser.


How can this vulnerability impact me? :

Exploitation of this vulnerability can lead to the theft of sensitive information such as JWT session tokens, which may result in account hijacking and unauthorized access to user accounts.


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