CVE-2026-39970
HighSummary
TypeBot is a chatbot builder tool that contains a critical stored XSS vulnerability in the profile picture upload form in versions 3.15.2 and prior. The application fails to sanitize or restrict SVG/XML uploads, allowing for the execution of malicious JavaScript code.
Risk Assessment
This vulnerability allows attackers to execute arbitrary JavaScript in victims' browsers, potentially leading to session/token theft, account takeover, and exfiltration of sensitive user data.
Recommendation
It is recommended to upgrade to version 3.16.0, where the issue has been fixed. Additionally, implementing further security measures to prevent the upload of dangerous files is advisable.
Original NVD description (English source)
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.