CVE intelligence and bounded remediation

CVE-2020-28141 — The messaging subsystem in the Online Discussion Forum 1.0 is vulnerable to XSS in the message body

Medium CVSS 5.4

The messaging subsystem in the Online Discussion Forum 1.0 is vulnerable to XSS in the message body. An authenticated user can send messages to arbitrary users on the system that include javascript that will execute when viewing the messages page.

Severity
Medium
CVSS
5.4 (3.1)
Published
2021-04-19
CISA KEV
Not currently listed
Ecosystem
javascript/npm
Weaknesses
CWE-79

Affected products

  • online_discussion_forum_project / online_discussion_forum / 1.0

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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