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CVE-2026-39970— TypeBot: Stored Cross-Site Scripting (XSS) via SVG File Upload On Profile Picture Form

AI Predicted 8.5 Difficulty: Easy EPSS 0.05% · P15

Affected Version Matrix 1

VendorProductVersion RangeStatus
baptisteArnotypebot.io< 3.16.0affected
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I. Basic Information for CVE-2026-39970

Vulnerability Information
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Vulnerability Title
TypeBot: Stored Cross-Site Scripting (XSS) via SVG File Upload On Profile Picture Form
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
baptisteArnotypebot.io < 3.16.0 -

II. Public POCs for CVE-2026-39970

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III. Intelligence Information for CVE-2026-39970

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Vendor Advisories for CVE-2026-39970 (1)

Vendor Pages for CVE-2026-39970 (1)

Same Patch Batch · baptisteArno · 2026-05-22 · 11 CVEs total

CVE-2026-3371210.0 CRITICALTypeBot: Unauthenticated SSRF via isolated-vm fetch in preview chat endpoint bypasses SSRF
CVE-2026-284458.7 HIGHTypebot: Stored XSS via Rating Block Custom Icon Bypasses isUnsafe Sandbox in Builder Prev
CVE-2026-399657.7 HIGHTypeBot: SSRF via Open Redirect Bypass in HTTP Request and Code Blocks
CVE-2026-342077.6 HIGHTypeBot: SSRF Protection Bypass via DNS-Resolved Hostnames in Webhook / HTTP Request Valid
CVE-2026-399687.1 HIGHTypeBot: Cross-Workspace Credential Theft via Bot-Engine Preview Endpoint
CVE-2026-284446.5 MEDIUMTypebot: IDOR in Result Logs Endpoint Allows Cross-Workspace Data Disclosure
CVE-2026-399666.5 MEDIUMTypeBot: Async filter() bypasses authorization, allowing IDOR in getLinkedTypebots and lea
CVE-2026-399696.5 MEDIUMTypeBot: WhatsApp Webhook Endpoint Missing Signature Verification
CVE-2026-399645.4 MEDIUMTypeBot: Stored XSS via javascript: URI in text bubble links — bot author executes JS on v
CVE-2026-399673.1 LOWTypeBot: Cross-Typebot Result Data Access via Missing typebotId Filter

IV. Related Vulnerabilities

Same product: typebot.io
Same vendor: baptisteArno
Same weakness: CWE-79

V. Comments for CVE-2026-39970

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