CVE-2026-3837
Stored XSS in Frappe 16.10.0 via Unsafe HTML Attribute Handling
Publication date: 2026-04-22
Last updated on: 2026-04-27
Assigner: Fluid Attacks
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| frappe | desk | 16.10.0 |
Helpful Resources
Exploitability
| 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 allows an authenticated attacker to store specially crafted values in multiple field types within the affected application. When another user opens the affected document in Desk, these stored values can trigger the execution of client-side scripts.
The root cause is that the vulnerable formatter implementations insert stored values directly into raw HTML attributes and element content without properly escaping them, leading to potential script execution.
How can this vulnerability impact me? :
This vulnerability can lead to client-side script execution when a user opens a document containing the crafted values. This could allow attackers to perform actions such as stealing user session data, executing malicious scripts in the context of the victim's browser, or manipulating the user interface.