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Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVE-2026-28445

Low
0/10

Summary

The rating block's custom icon feature accepts arbitrary HTML/SVG via the `customIcon.svg` field and renders it using Solid's `innerHTML` directive without any sanitization. When a malicious typebot is imported or crafted by a workspace collaborator, the payload executes in the builder's DOM context (builder.typebot.io), bypassing the `isUnsafe` Web Worker sandbox that protects Script blocks during preview. This allows session hijacking and privilege escalation within the builder application. Versions prior to 0.10.1 are affected.

  • LOW
  • NETWORK
  • HIGH
  • CHANGED
  • REQUIRED
  • LOW
  • HIGH
  • NONE

CWE-79 - Cross Site Scripting

Cross-Site Scripting, commonly referred to as XSS, is the most dominant class of vulnerabilities. It allows an attacker to inject malicious code into a pregnable web application and victimize its users. The exploitation of such a weakness can cause severe issues such as account takeover, and sensitive data exfiltration. Because of the prevalence of XSS vulnerabilities and their high rate of exploitation, it has remained in the OWASP top 10 vulnerabilities for years.

References

Advisory Timeline

  • Published