EUVD-2026-31480
GHSA-hqmv-v56g-4m47
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Lifecycle Timeline
3Blast Radius
ecosystem impact- 1 npm packages depend on @typebot.io/js (1 direct, 0 indirect)
Ecosystem-wide dependent count for version 0.10.1.
DescriptionNVD
TypeBot is a chatbot builder tool. In versions prior to 3.16.0, the Typebot viewer (packages/embeds/js) renders anchor tags from rich text bubble content without filtering the javascript: URI scheme. A bot author can set a link URL to javascript:PAYLOAD, which executes in the visitor's browser context when clicked. Since the viewer is typically embedded in a third-party site, the attacker's JavaScript runs in the host page's origin and can exfiltrate cookies and session tokens. This can result in any authenticated Typebot user (including those on the free tier) being able to create a bot with this payload. Shared bots are publicly accessible - no victim authentication is required. This issue has been resolved in version 3.16.0.
AnalysisAI
Stored XSS in Typebot's JavaScript viewer embed (packages/embeds/js) allows any authenticated bot author - including free-tier users - to inject arbitrary JavaScript into a visitor's browser by setting a rich text bubble link URL to a javascript: URI. When a visitor clicks the malicious link within an embedded bot, the payload executes in the host page's origin (S:C scope change), enabling exfiltration of cookies and session tokens from the embedding third-party site. …
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External POC / Exploit Code
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