PT-2026-42822 · Baptistearno · Typebot.Io

Published 2026-05-22 · Updated 2026-05-22 · CVE-2026-39970

Mitre

CVSS v4.0

8.5

High

Base vector

AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

TypeBot is a chatbot builder tool. Versions 3.15.2 and prior contain a critical stored XSS vulnerability in the app.typebot.io profile picture upload form. The application fails to sanitize or restrict SVG/XML-based uploads and directly renders them when accessed through the domain. By uploading a crafted malicious SVG file containing embedded JavaScript, an attacker will execute arbitrary JavaScript code. This vulnerability directly enables stored XSS exploitation because the payload is persistently stored on your infrastructure (app.typebot.io) and accessible from a public-facing, permanent link. Stored XSS via malicious SVG uploads to app.typebot.io allows attackers to execute arbitrary JavaScript in victims' browsers, enabling session/token theft, account takeover, and exfiltration of sensitive user data. This issue has been fixed in version 3.16.0.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-39970

Affected Products

Typebot.Io

References · 2

• https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-jj87-c343-26vp · Note
• https://github.com/baptisteArno/typebot.io/releases/tag/v3.16.0 · Note