CVE intelligence and bounded remediation

CVE-2024-27290 — Docassemble is an expert system for guided interviews and document assembly

Medium CVSS 6.1

Docassemble is an expert system for guided interviews and document assembly. Prior to 1.4.97, a user could type HTML into a field, including the field for the user's name, and then that HTML could be displayed on the screen as HTML. The vulnerability has been patched in version 1.4.97 of the master branch.

Severity
Medium
CVSS
6.1 (3.1)
Published
2024-03-21
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-79

Affected products

  • jhpyle / docassemble

Matched remediation archetype

Cross-site scripting and unsafe browser output

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Check exposure

  • Trace reflected, stored, and DOM-derived untrusted values into HTML, attributes, URLs, styles, scripts, and client-side template sinks.
  • Identify affected origins, authenticated user roles, sensitive browser capabilities, and where content is shared across tenants.
  • Review framework escaping, rich-text sanitization, legacy templates, and client-side rendering paths.

Remediate safely

  • Use context-aware framework output encoding and safe DOM APIs; keep untrusted data out of executable contexts.
  • Sanitize intentionally supported markup with a maintained allowlist policy and validate URLs and attributes separately.
  • Update affected rendering components and add tests for every output context using inert sentinel markup.

Authoritative sources

Complete CVE record and remediation plan

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