CVE intelligence and bounded remediation

CVE-2019-9558 — Mailtraq WebMail version 2.17.7.3550 has Persistent Cross Site Scripting (XSS) via the body of an e-mail message

Medium CVSS 6.1

Mailtraq WebMail version 2.17.7.3550 has Persistent Cross Site Scripting (XSS) via the body of an e-mail message. To exploit the vulnerability, the victim must open an email with malicious Javascript inserted into the body of the email as an iframe.

Severity
Medium
CVSS
6.1 (3.0)
Published
2019-03-12
CISA KEV
Not currently listed
Ecosystem
javascript/npm
Weaknesses
CWE-79

Affected products

  • mailtraq / webmail / 2.17.7.3550

Matched remediation archetype

Cross-site scripting and unsafe browser output

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

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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