Stored XSS Vulnerability in TypeBot Chatbot Builder Tool
CVE-2026-39970

8.5HIGH

Key Information:

Vendor

Baptistearno

Status
Typebot.io
Vendor
CVE Published:
22 May 2026

What is CVE-2026-39970?

TypeBot, the chatbot builder tool, contains a stored XSS vulnerability in its profile picture upload form, affecting versions 3.15.2 and earlier. The application inadequately sanitizes SVG/XML uploads, allowing attackers to upload malicious SVG files embedded with JavaScript. When a victim accesses these files through the app's domain, the embedded script executes, potentially granting attackers unauthorized access to user accounts, session tokens, and sensitive data. This vulnerability highlights the importance of proper input validation and output escaping in web applications. The issue has been resolved in version 3.16.0, which addresses the flaws in the upload functionality.

Affected Version(s)

typebot.io < 3.16.0

References

https://github.com/baptisteArno/typebot.io/security/advis...
x_refsource_CONFIRM
https://github.com/baptisteArno/typebot.io/releases/tag/v...
x_refsource_MISC

CVSS V4

Score:
8.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.